Sorry, Frenchy, I didn't get the number for the wheel cylinders at the time, just bought the kits, which seem to work fine. I collect selected tips from the Forum and in 2008 Tom Overfield posted this number for the cylinders from Napa: <!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:DoNotOptimizeForBrowser/> </w:WordDocument> </xml><![endif]-->WC24955, 24954