25mm 42mm 60mm 75mm Duct Pipe For Air Diesel Parking Heater Conditioner Ducting. Car Parking Air Diesel Heater Stainless Steel Exhaust Pipe & Silencer 60-300cm. Cell Count: 400 Cell. Any Size Exhaust Flexi Tube Flexible Polylock Pipe Stainless Steel 1/0.5/0.25M.