You Are Looking at A Piece of Vacuum Bag Poly-fabric Material 5 ft by 20 feet, Punch resistant, Heavy duty Made in the USA by Polar Plastics, 6 Mil thick, good for vacuum bagging Epoxy Resin Infiltration infusion. This bagging come in as a 5 X 10 sleeve and will easily bag a 4 X 8 composite board upto 6 inches thick. Vacuum Bagging Fabric:5X20ft 6 Mil Heavy Duty Thick Strong punch Heat resistant Track Page Views With Auctiva's FREE Counter