Water & Wood 2 Pieces Clear Plastic Fish Tank Cover Clip for 4-12mm Glass Thickness Prodcut Name : Fish Tank Glass Clip;Material : Plastic Thickness : Fit for 4-12mm;Total Size : 14 x 4 x 4.5cm / 5.5" x 1.6" x 1.77"(L*W*T) Aquarium cover holder, suitable for any types of tank Help you clean the tank or change the water more easily Help firmly hold hose, assure no slipping, easy installation