1. Applicable models: This fuel tank cap starter ball kit is suitable for Fuxtec FX RM1855, Fuxtec FX RM1860, Fuxtec FX RM2055, Fuxtec FX RM2060, Fuxtec FX RM2060PRO and Fuxtec FX RM1630. It is suitable for 95% of the mowers listed (models suitable for T375, T475, T575 engines). It is not suitable for T675 engine.2. Highly Matched: With exquisite manufacturing and reliable materials, this replacement fuel tank cap primer bulb kit can perfectly match the original accessories of your lawn mower.3. Durable ABS: This replacement fuel tank cap primer ball kit is made of ABS material, with fine workmanship, durable, not easy to damage, and greatly extends the service life.4. Fine craftsmanship: Professional manufacturing, exquisite craftsmanship and high precision help to bring out the best performance and effectively improve the working performance of the lawn mower.5. 2 Sets: There are 2 sets of replacement accessories, including two fuel tank caps and 2 primer balls, which can meet your replacement and repair needs.