The material may devide into Nylon (CHN) and PP (CHP).
Three different shape are named 2#, 3#, 4#.
The color may in black, white, transparent are available, and colorful on your request.
2# There are 250 hooks per sq. cm.
It's good to use with Velour.
3# There are 160 hooks per sq. cm.
It's soft and doesn't injury clothing.
4# There are 115 hooks per sq. cm.
The hook is thick, strong, and good to use with Un-Napped loop.