This tool enable cups to be installed smoothly without scratching or damage the o-ring in the cylinders. 
Contents:
           1-1/2" (33.2mm / 35mm) for UD/FUSO, HINO
           1-3/8" (31.2mm / 33mm) for UD
           1-7/16" (36.7mm / 38.5mm) for HINO
           1-1/2" (38.2mm / 40.0mm) for HINO