Used to connect pumps to filters, UV sterilizers, waterfalls and spitters. Strong and durable will not collapse due to back-pressure or reasonable weight from gravel or cover material. Black color inhibits algae formation and is hard to see once installed. 10 feet long. Size is 3/4 Inch X 10 F. Dimensions are 1.125 X 0.271 X 1.167 Plastic Tubing. UPC Code = 015561013116