Sand For Marine/Hardwater Freshwater Aquariums block-return-exchange A horn knot is used

A horn knot is used when the roper wants to "tie hard" instead of dallying

such as avoiding contact with eyes and skin and keeping out of the reach of children and pets

Featuring 210T nylon lining with twin adjustable chest straps

This pad also comes with polypro edging and synthetic wear leathers

Great for training and maintenance work

Sand For Marine/Hardwater Freshwater Aquariums block-return-exchange A horn knot is usedUse the Florida Crushed Coral in marine aquariums and hardwater freshwater aquariums. It also works great in calcium reactors. Use One Pound Per Gallon. Crushed Coral is Graded Aragonite Sand and Gravel. Color: brown Size: 19" x 12" x 2. 5"