This is an used muffler intended for large gas or nitro engines. The length is 8.0" diameter 2.0: and inlet pipe diameter is0.875" with the outlet being 0.5" The weight is 8.25 ounces. This has some marks on the body where it was rubbed. This part of a consignment from a deceased club mate, and he flew large scale models. I combine items to reduce the shipping costs Please ask me for an invoice if you have questions on shipping, NOTE: FREE FIRST CLASS SHIPPING IN USA ONLY