Feature: 1. Suitable for small tank main cylinder drainage, but also as a small tank of the simple water pipe joint. Specification: Condition: 100% Brand New Item Type: Fish Tank Connector Material: PVC Color: Black Quantity: 1PCS Weight: Approx. 29g Inner Diameter: Approx. 20mm/0.79inch Package List: 1 x Fish Tank Connector Note: Suggestion: The fish tank can be opened 20mm, the longer tooth tube can clamp the glass within 20mm, and the water outlet can be connected with the hard tube with the outer diameter of 20mm.