The "large" Girling 14LF caliper can be identified by the 1 7/8" (1.89" / 48mm) diameter pistons and four bolts holding the caliper sections together. The EPDM seals in this kit are formulated to work with any DOT-rated brake fluid (not for use with hydraulic oil). Each kit contains piston seals, dust seals and dust seal retainers for two calipers.