1、APPLICABLE MODEL: This is an aftermarket piston kit oversize + 0.25, perfectly suitable for outboard 2 stroke 9.9 15 HP, useful, practical, and reliable 2、REPLACEMENT PART NUMBER: The OEM is 6E7‑11635‑00, which is a perfect replacement for the original part and can be directly replaced for installation 3、DURABLE MATERIALS: Outboard piston kit is manufactured from a durable metal alloy with erosion and rust protection to ensure overall high durability and stability 4、PERFECT MATCH: The outboard motor piston kit is designed and manufactured to original specifications, meeting or exceeding the OEM to ensure form factor and function match the original device 5、EXCELLENT PERFORMANCE: Designed to replace old and damaged pistons, remove old parts and replace them directly, providing more complete sealing performance and stronger mechanical energy