Features?? 1. FITMENT -- Fits for General Pump / Interpump part 51040009 Ceramic Plunger for TT9071 TT2028 TT2035 TP2520, TP2526, TP2530, TP2533 and other Pump. 2. FUNCTION – Replace your broken ceramic piston, prevents damage to pump, pump seals, unloader valves, and other pressure washer parts. 3. DIAMETER -- 25mm" long , Inside diameter 9mm, Outside diameter 15mm??come with 1-Pack??. 4. SUPERIOR QUALITY – Made from high quality ceramics, good toughness, high temperature and high corrosion resistance, no worry about cracked or broken ceramic piston. .