This muffler insert is constructed from durable metal material, offering high hardness and long-lasting performance. It is designed to help reduce exhaust noise and noise output, contributing to a quieter environment. The insert is compatible with tail exhaust pipe diameters of 35mm, 42mm, and 45mm, providing three size options for flexibility in fitment. Features: 1. Universal removable muffler insert. 2. Helps reduce deep tone sound and exhaust noise output. 3. Durable metal construction. 4. Easy to install, adjustable, and removable. 5. Compatible with exhaust pipe diameters of 35mm, 42mm, and 45mm. Specifications: Color: Silver Material: Metal Package Weight: Approx. 112g Optional Base Diameter (millimeter): 35mm / 42mm / 45mm Optional Diameter (inch): 1.38" / 1.65" / 1.77" Whole Length: Approx. 135mm / 5.31" Thread Size: Approx. 6mm / 0.24" Package Included: 1 x Muffler Insert Note: 1. Please allow 1–3mm error due to manual measurement. 2. Monitor settings may vary, so colors in images may differ slightly from the actual product. 3. No installation instructions included. Professional installation is recommended. 4. Please verify the size measurements before purchase.