6" Tubing Hooks are excellent for holding MistAway tubing in place in mulch/flower beds and other places. Sold by weight. Each pack contains about 33 hooks. Typically 2 hooks, sometimes 3, are used between risers to hold tubing in place, your installation may differ.
Their use is completely optional, however pro installers use them to be sure tubing doesn't wiggle it's way above loose mulch or other flower bed topping.
Anytime you want to be sure MistAway tubing stays put, these hooks are great. Fast and easy!