iKKEGOL Pack of 4 Stainless Steel Round 304 Glass Clip Clamp Bracket Holder Flat Surface for Window Balustrade 6-8mm Pack of 4 Stainless Steel Round Glass Clip Glass Clip Clamp Bracket Holder Flat Surface 304 Glass Clip S size: 53*33*20 mm (H x L x T/D) for Window Balustrade 6-8mm Glass Clamp Handrail Free Hexagon screws driver There are 4 Size avaiable : S 6-8mm M 8-10mm L 10-12mm XL 15-17mm . Attention(for clamp tighten)!!! 8mm glass thickness,best choose S Size.10mm glass thickness,best choose M Size.