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. 100 feet long. Size is 1 1/2 Inch X 10. Dimensions are 1.833 X 1.833 X 1.792 Plastic Tubing. UPC Code = 015561213042