1:50 Scale 3D Printed Semi Truck Flat Top 9" Exhaust Stacks Pair of 2. Good for Tonkin, First Gear, Diecast Masters and more. Universal Fit. May require modification before use. Unpainted and printed in standard gray resin. Measurements are roughly 61mm high, Pipe diameter is 4.75mm. May require minor preparations before paint such as sanding or filing. Combined shipping available at checkout. --Proudly designed and made in the USA!--