ITEM NAME:Aquarium Tank Glass Cover Acrylic Clip Support Bracket 12 mm I3M6 Aquarium Tank Glass Cover Acrylic Clip Support Bracket 12 mm I3M6 Aquarium cover holder, suitable for all types of tank Help you clean the tank set or change the water more easily Support hose to hold, assure no slipping, easy installation Can be used on 10 mm thick glass hold Dimensions (L x W): approx. 40 mm x 30 mm Thickness: approx. 3 mm Groove width: approx. 12mm package content: 1 x Aquarium Tank Clip Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.