POLYOLEFIN 4FT LENGTHS POLYOLEFIN CUT PIECES POLYOLEFIN KITS POLYOLEFIN ROLLS POLYOLEFIN 3:1 POLYOLEFIN 4:1 PVC 2:1 PTFE 2:1 POLYTETRAFLIUOROETHYLENE DOUBLE WALL 4FT LENGTHS DOUBLE WALL CUT PIECES DOUBLE WALL KITS DOUBLE WALL ROLLS ADHESIVE LINED 4FT LENGTHS