Ideal for replacing rusted-out exhaust bafflesWork great for custom fabrication as well25 mm, 32 mm, 38 mm, 41 mm, 44 mm, 51 mm OD tubing (1,0"; 1,25"; 1,5"; 1,625"; 1,75" and 2,0") is 22-gauge stainless steel63,5 mm and 76,2 mm OD tubing (2,5" and 3,0") is 22-gauge stainless steelAll have 63,5 mm (21/2") diameter holes; 3,8 mm (3/16") staggered centers, 5 holes per square centimeter (33 holes per square inch) and 40% open area610 mm (24") long baffles available with or without packing; muffler packing also sold separatelyMuffler packing sheet measures 25,5 cm x 30,5 cm (10" x 12"); 8 mm (5/16") thickBaffles with packing include two sheets of packing materialAll styles sold eachMade in the U.S.A.