The pond boss 8 inch Waterfall Spillway seamlessly adds a beautiful waterfall to your pond. It is made with durable UV resistant high impact plastic and has connections on the back for tubing. There is also an aeration feature that adds oxygen to the water to create a healthy environment for fish and plants. The spillway is designed to be easily disguised so you can create a natural looking waterfall for your pond or disappearing water feature. 14.5 in. x 10.5 in. x 6 in. Fits 3/4 in. and 1 in. ID tubing (tubing not included). pond boss Pumps recommended (pump not included): PP800UV, PW1300UV, PW1250, PW2300.