Best in 7 days
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Ships within 48 hours · Estimated delivery Jun 21 - Jun 26
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Description
AccuraSea Seawater Reference Solution 250 mlAccuraSea Seawater Reference Solution is the only calibration solution of its kind made from real seawater. It's pure natural seawater micron filtered and UV sterilized then adjusted with reverse osmosis water to match the standard S 35 at 25 C (77 F). Use it to accurately calibrate seawater refractometers and to check the accuracy of swing arm hydrometers. You may also want to use it as a reference for test kits used to measure the concentrations of
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- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.7 ★★★★★
Based on 905 reviews
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Product Reviews
★★★★★ 5
Very strong magnet
Size: Large 24in x 1.25in
Great product,, very secure and the long strap allows you to hang a variety of items.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
★★★★★ 5
Buy This!
Size: Medium 16in x 1in
Super heavy duty! Not only does the magnet hold a ton, the strap is totally adjustable to hold wide items. Currently it's holding an 8 ish lb rope on the side of my garage fridge with zero issue! Easy to use and works great!
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Reviewed in the United States on December 18, 2025
★★★★★ 4
"Keep On Holding On" assist.
Size: Medium 16in x 1in
Magnet is powerful indeed . The velcro strap is quite long and I have not figured out how to shorten it without cutting it. Great for hoses, ropes, and pull alongs.
Temporary use as hold down in a truck bed for lite items.
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Reviewed in the United States on November 9, 2025
★★★★★ 5
Great magnet
Size: Medium 16in x 1in
Strong magnet, sturdy strap
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Reviewed in the United States on April 4, 2026
★★★★★ 5
Awesome!
Size: Large 24in x 1.25in
These straps are exactly what I needed! I got them to hang my extension cords in my truck and they worked so well, I got three more to hang my water hoses in my truck also!
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Reviewed in the United States on May 7, 2026
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