Ceramic Disc Cartridge Generic Price Pfister 910-310 Cartridge, made to fit most Price Pfister bathtub and shower faucets such as Bath Series 01, Verve & Windsor tub/shower faucets. ID length 9, broach H. Replace old Price Pfister shower stems with this ceramic dis cartridge. 12 - Spline, Length is 4 1/2", Brass Construction. Replacement Stem for 00131XA 00731XA Valve body 4th picture is the original Pfister cartridge. For reference purpose only. It is generally suggested to remove seats inside the shower frame if you want to replace your compression stems with this ceramic disc cartridge. If you have stems that are longer than 4 7/16", you will need to change the trim, too, in order to make the ceramic disc cartridge work. Please check more of our products at www.faucet888.amazonwebstore.com