B.I.R.S. Machine & Supply Inc is a distributor of Red Virgin UHMW sheet. Our UHMW Red Virgin sheet has a molecular weight of 3.5 to 5 million. It ntains no additives or reprocessed materials. B.I.R.S. Machine & Supply Inc offers UHMW-PE sheet in a wide variety of lors. See UHMW-PE Sheet. UHMW-PE is ultra high molecular weight polyethylene