Expands from 6' to 25'. Perforated FLEX-Drain with removable polyester sock can be used in most drainage applications where surrounding soil or sand is fine enough to require filtration and/or surrounding debris is considerable. The soil-tight fittings are built into the pipe and the pipe holds its shape after it is bent, therefore no other connectors need to be purchased to connect multiple pieces of drain pipe together. Simply dig your trench, lay your FLEX-Drain pipe, and cover it up. FLEX-Drain meets the Corrugated Polyethylene Pipe Association's test for crush resistance. No. 50510: Size: 4" X 25', Length: 25', Outside Diameter: 4.09", Inside Diameter: 3.37", Material: Polyethylene, Type: Perforated ---- 1. 海外直輸入品となりますので、新品であっても、パッケージに多少のダメージがある場合もございますが、商品本体には問題ございませんのでご安心ください。2. 日本国内でのメーカーによる製品保証等は適用されません。3. パッケージや、説明書等は、英語表記となります。