Ideal for replacing rusted-out exhaust baffles Work great for custom fabrication as well Tubing is 22-gauge 409 stainless steel with 1/8in diameter holes, 3/16in staggered centers, 33 holes per square inch and 40% open area 2.5in diameter tubing is 16-gauge steel; perforated sheet is 20-gauge steel 24in long baffles available with or without packing; muffler packing also sold separately Muffler packing sheet measures 10in x 12in; 5/16in thick Baffles with packing include two sheets of packing material All styles sold each