1:87 HO Scale 3D Printed Semi Truck Angled Back Chino 9" Exhaust Stacks Pair of 2. Universal Fit. May require modification before use. Unpainted and printed in standard gray resin. Measurements are roughly 37mm high, Pipe diameter is 2.75mm. May require minor preparations before paint such as sanding or filing. Combined shipping available at checkout. --Proudly designed and made in the USA!--