UHMW Sheet 3/8″ x 4″ x 48″ – – HNOKAY. UHMW (Ultra High Molecular Weight Polyethylene) Sheet, Opaque White, Standard Tolerance, ASTM D4020, 1/8″ Thickness, 12″ Width, 12″ Length 4.2 out of 5 stars 88 2 offers from $8.68 . large size uhmw polyethylene sheet for Textile industry 3/8 . 3/4″ x 48″ x 96″ UHMW Sheet Overview.