[Fuel Cap 799585] This gas cap fits Troy Bilt 200 and 100 mowers with 550EX B&S engine. Compatible with Troy-Bilt, MTD, Yard Machines, Bolens lawn mowers, Toro Timemaster, and Craftsman 580752950 pressure washer. [Compatibility] Replaces part numbers 799684, 799585, 591003. The 725ex gas cap is compatible with & 550e, 550ex, 625e, 675ex, 725ex Series, and Professional Series 7.75-8.75 engines. [High Quality] Made of polyamide plastic. This material offers good mechanical properties, heat resistance, chemical resistance, wear resistance, and self-lubrication, enhancing durability and reliability. [Easy To Install] The fuel tank cap is easy to install and replace. Compact, lightweight design allows for convenient storage and transport. Helps prevent fuel cap loss and enables quick replacement. [Saves You Money] Avoid potential fuel system issues and maintain reliable mower performance. Note: Installation guide not included. Professional installation is recommended. Clear images and measurements are provided to help ensure compatibility. Please verify specifications before purchase. Material: Plastic. Color: Black. Package Contents: 2 x Fuel Tank Cap or 1 x Fuel Tank Cap. The package includes only the items listed. Lighting and display differences may cause slight color variations. Measurement error allowed is +/- 1-3 cm.