This cylinder piston kit is compatible with ES-211, GT-201, HC-151, HC-161, HC-200, HCR-151, PAS-211, PE-201, PPF-211, SHC-211, SRM-211, and SB/U models.The kit includes a cylinder and piston engineered for consistent performance and fitment.It is suitable for engine rebuilds or replacements where precise compatibility is required.