Exhaust Thimble Heavy Duty Mobile and Stationary Use

Perfect for routing exhaust through walls and ceilings of Trailers  Box Trucks etc... and Stationary Applications. Available in 2", 2.5", 3" and 3.5". Let us know which size you need after purchase.
Exhaust pipe thimbles are used where engine exhaust pipes penetrate through walls or roofs. The thimble provides an air gap between the hot exhaust pipe and the wall or roof structure. When exhaust pipes penetrate through combustible walls or roofs, thimbles are required by NFPA 37. Thimbles can be furnished with thermal insulation, designed to accommodate roof pitch, and can be constructed in various grades of steel or stainless steel.