1:64 3D Printed Semi Truck Straight Flat Top Exhaust Stacks Pair of 2 for DCP, First Gear, Ertl, Speccast and More. Universal fit. May require modification before use. Unpainted and printed in standard gray resin. Measurements are roughly 47.5mm High, Pipe diameter is 3.6mm. May require minor preparations before paint such as sanding or filing. Combined shipping available at checkout.