Inquiry (采购产品): 7 ID Pipe I am trying to extrude a product out of a pipe (7" plunger will be pushing through)so I need the id to be very smooth. Steel is fine. Lighter wall thickness - say about 1/16" wall. Plastic or aluminum may work. Do you have anything? **** Hidden Message ***** Bob Burns 16142 Company: Rooftop Equipment Inc E-mail: bob@rooftopequipment.com **** Hidden Message ***** bob@rooftopequipment.com