Specification: Inner Diameter: 50mm/1.97 inch; Outer Diameter: 58mm/2.28 inch; Height: 122mm/4.8 inch; Fit Glass Max Thickness: 20mm/0.79inch; Packing List: 1 x PVC Tank Fitting Adapter Advantage: It is made of durable PVC with the features of high strength, lightweight, moisture resistance, wear resistance, and chemical corrosion resistance. Instruction: Easy operation, you can drill a hole in the glass that is the same with the outer diameter of the white pvc fitting, place one gasket inside and outside the glass, then tighten it. Application: The pipe joint is designed for open-hole sealing connection for inlet and outlet pipes of water tanks, aquariums, buckets, etc. NOTE: Please check the size you need before buying.