Product Information:No. Item 1 Product NameU Tip Clips 2 Specification(In Stork) Model24U28U32UmaterialCopper/steel/stainless steel in ... on clip in hair extensions, lace wigs, toupee, hair piece, top closure and etc., it is made of best stainless steel ... /steel/copper, and with silicone pipe inside, except 24mm U tip clips. You can use it make clip hair extensions by ...