Compatible with H143 H143R G45 chainsaws. The option you select determines the style. Package includes 1 muffler. Styles vary by option; select the style that matches your model. Function and compatibility - Replaces worn or damaged muffler to restore proper exhaust function and help maintain engine performance on H143, H143R, and G45 chainsaws. - A straightforward replacement part for maintenance and service on these models. Important compatibility note - Please check pictures carefully for compatibility before purchasing. Specifications and options - Material and exact size vary by style; refer to the option images for details. Use scenarios - Scenario 1: Replacing a worn muffler during routine maintenance on an H143, H143R, or G45 chainsaw. - Scenario 2: Keeping a spare muffler on hand in a maintenance kit for field service or workshop repairs. - Scenario 3: During repair or upgrade work to maintain original exhaust performance on these chainsaw models. Additional guidance - If you are unsure which style fits your chainsaw, please compare the muffler photos to your current part or contact the seller for confirmation.