Home / KAP-SPEC-3.937x3.74-NA KAP-SPEC-3.937x3.74-NA KAP-SPEC-3.937x3.74-NA 3.937" O.D/3.74" I.D. 5 mil Polyimide Ring, No Adhesive. Sold in 50 piece increments. $118.77 Per Roll Default Title Quantity Add to Cart Bulk Quantity Pricing Available