Product Description: A "roller-bearing" pipe support used to support roof-mounted gas pipes, electrical conduit, solar piping and other mechanical piping. Unique design absorbs thermal expansion and contraction of pipes thus preventing damage to the roof membrane. Pipes rest on a self-lubricating roller which is made of a stainless steel rod and a polycarbonate resin roller. The pipe support base and all other metal parts are made of stainless steel. Pipestand will accommodate up to 4" pipe (inside diameter) or up to 5" (outside diameter) pipes.