Sch 40 PVC Pipe, custom length, cut to size.
Please note: UPS adds a surcharge for all packages over 4' long. So it's cheaper to ship several smaller pieces than it is one long piece. Cut 4" schedule 40 PVC pipes are non-cancelable and non-returnable so please be sure you are ordering the correct size and length. The price you see is the price per foot on the custom length 4" white PVC pipes. Thank you.
Check out these 6" Sch 40 PVC pipes, which feature these pipes in a slightly larger diameter.
See http://dims.flexpvc.com for dimensions.