Ceramic Disc Cartridge - Generic Price Pfister 910-030 Shower Stem-by Plumb USA Ceramic Disc Cartridge Fits Price Pfister 910-310 Cartridge Replace old Price Pfister shower stems with this ceramic dis cartridge. 12 - Spline, Length is 4 7/16", Brass Construction Take the white plastic connector and trun it around to change Hot or Cold Side. With this cartridge, you will save the hassle to replace washers that has bugged you for years!