Introducing the Hein-Werner 890-021-666 Pump Piston Assembly, designed for 2/3-ton service jacks. This OEM-compatible part ensures a seamless fit with various brands, including Walker, Lincoln, Snap-On, and Gray. With a 3-ton load capacity, this assembly guarantees outstanding durability and reliable performance. Installing this pump piston assembly is a breeze, making it convenient for professionals and DIY enthusiasts alike. Upgrade your service jack with confidence, knowing that this OEM part will deliver exceptional results. Replace your old part numbers 234948, 233107, 227045 and YA700B11 effortlessly with this high-quality pump piston assembly.