stainless steel hair extension metal clips 1,2.3cm,2.8cm,3.2cm,3.8cm are all ok 2.any color is ok to match hair hair extension snap clips1these clips are designed specially for hair extension use,2there are2.3cm,2.8cm,3.2cm,3.8cmwide,made of metal,carbon steel,stainless steel ,and have a silicone grip for extra security. stainless steel hair extension clips