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Copkim 7.87 Inch Plastic Secchi Disk Set Secchi Disc with Black and White Quadrants, Steel Cone, Holding Line and 100 ft Tape Measure for Clarity Measurements

Copkim 7.87 Inch Plastic Secchi Disk Set Secchi Disc with Black and White Quadrants, Steel Cone, Holding Line and 100 ft Tape Measure for Clarity Measurements

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About this item

  • Comprehensive Package: every purchase of the set includes the items you need for water clarity measurements; The package contains 1 piece of Secchi disk, 1 roll of holding string, 1 piece of cone weight, and 1 piece of tape measure; This ensures that you have tools to accurately measure both fresh and seawater transparency
  • Ideal Size: bearing a diameter of around 7.87 inches/20 cm, the Secchi disc is suitably sized for efficient visibility under water; Meanwhile, the tape measure features a measurement of about 100 ft/ 30 meters, and the rope is about 16.4 ft/ 5 meter long, measurements that allow ample depth tolerance for deep water clarity measurement without hindrance
  • Quality Materials: the acrylic Secchi disc, the pivotal piece, is made from acrylic which ensures its resilience, lightweight and portable; The cone, designed to weigh down the disk, is crafted from stainless steel ensuring its longevity, hard to rust; The holding string is made from robust polymer to handle the disk and cone weight without elasticity, hard to tear and sturdy for long time use
  • Freshwater Measuring: use the black and white side, and when the water surface is stable on an unclouded day, lower the acrylic Secchi disk into the water with a holding rope until the disc can hardly be seen from above; Measure the length of the rope immersed in water, repeat it several times, and get the average to get freshwater clarity
  • Saltwater Measuring: use the pure white side, at the backlight of the main deck, put plastic Secchi disc into the water, and sink to a depth just out of sight; Then slowly lift the rope until the dish is faintly visible, read the mark of the rope on the water surface, repeat for 2 or 3 times and take the average to get observed clarity; Read the mark of the rope at the crest and trough respectively when wavy, if the inclination angle exceeds 15, the depth should be corrected

Overview

  • Brand: Copkim
  • Product Dimensions: 13.39"L x 8.27"W
  • Item Weight: 1.19 kg
  • Measurement Accuracy: High
  • Case Material: Acrylic

Low stock: 10 left

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Built for the Way You Train

At GearFighter, we believe combat sports gear should do more than simply fill a gym bag. It should support the way you train, move, practice, and prepare for every round.

Every training routine looks different. Some days are built around boxing drills, heavy bag work, and footwork. Some days are for MMA practice, grappling movement, kick training, conditioning, or simple home workouts. That is why GearFighter focuses on practical combat sports gear and training equipment that supports real routines instead of overcomplicating them.

Our products are selected with everyday usability in mind — reliable protection, useful training function, clean design, and gear that fits into regular practice. From boxing gloves and MMA equipment to protective gear, training pads, floor mats, and recovery tools, each item is chosen to help you train with more structure and confidence.

GearFighter is made for people who show up for practice, build discipline through repetition, and keep improving one session at a time. Simple, focused, and ready for the way you train.

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Where do your products ship from?

GearFighter works with trusted suppliers and fulfillment partners to ship combat sports gear and training equipment to customers. The shipping origin may vary depending on the item, warehouse location, and product availability.

Once your order is processed and shipped, you will receive tracking information by email.

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Orders are typically processed within 1–3 business days, Monday through Friday, excluding weekends and holidays.

Estimated delivery time is usually:

United States: 5–10 business days
International Orders: 10–20 business days

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Some orders may be shipped in separate packages depending on item availability, warehouse location, package size, or fulfillment timing.

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Please review each product description, size guide, materials, intended use, and care instructions before purchasing.

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Reviews

  • ⭐⭐⭐⭐⭐

    Jason Miller-Seattle, WashingtonI ordered a few training items from GearFighter for my home boxing setup, and everything feels practical and easy to use. The gear was simple to organize, and the overall quality feels good for regular training. I like that the store focuses on useful combat sports equipment without making things complicated.

  • ⭐⭐⭐⭐⭐

    Ryan Cooper-Austin, TexasI bought gloves, wraps, and a few accessories for weekly training. The products matched what I needed for bag work and general practice. The store was easy to browse, and I liked that the categories were clear. It made it easier to find boxing and MMA gear without searching through too many unrelated items.

  • ⭐⭐⭐⭐⭐

    Michael Turner-Denver, ColoradoGearFighter has been useful for building out my training space at home. I picked up some pads, storage items, and recovery tools, and they fit well into my routine. The products feel practical for everyday workouts, and I would shop here again when I need more training equipment.

  • ⭐⭐⭐⭐⭐

    Brandon Hayes-Portland, OregonI was looking for combat sports gear that could work for both gym sessions and home practice. GearFighter had the basics I needed, including protective gear and training accessories. The selection feels focused, and the products are easy to understand. Overall, it was a smooth shopping experience.