This Marine Power Jet Boat Rubber Exhaust Muffler Resonator is a high-quality product designed to enhance the performance of your boat's engine. It is compatible with Gator, ShoalRunner jet boats along with many other marine applications and are made of durable materials that ensure long-lasting use. These mufflers are used but in very good condition. These have a 3 inch inlet and 3 inch outlet. They measure about 14 inches in length. The internals are NOT burned out and are in very good shape. Please ask all questions before buying and buy with confidence as I support a 100% positive feedback rating. Thanks for looking!