2990-01-224-8874 Marine Exhaust Pipe. Corrosion Resistant Stainless Steel. 8-5/8″ OD x 22″ long. Heavy Dity, wall thickness measures approx, 0.125″ (1/8″)… Made by Kay Industries, p/n SK2717-2A. Original invoice is $573.72, Get it here and save $$$ Designed for US Navy Expeditionary Programs, Sealift Command. 15338 T1