Rotor Seal, 2-Groove Back Catalog number: CTS-21163 Availability: In the manufacturer's stock Price on request - + Recommended CTS-5656 Sapphire Plunger Price on request CTS-10532 Seal Wash Face Seal Price on request CTS-21240 ACQUITY I-Class SM-FTN Performance Maint. Kit,2890 Price on request