Vermeil Bead Chain Crimp End 0.7mm. A crimp end for the 14/20 Gold Filled Beading Chain which can be crimped onto the chain by squashing the middle of the barrel with crimping pliers or flat nosed pliers, there are cuts in the barrel to aid this operation. This is a Sterling Silver chain end gold plated with 1 micron of gold ( 40 mils or 0.0004 inch). Not exclusively for use with the beading chain, internal hole size is approx 0.7mm.