Shim Kit for Opel 1.9L CIH rear axles. Includes 23 shims of varying thickness'. Shims are individually bagged and marked with diameter and thickness. Each shim is also notched and corresponds to the thickness in the Opel service manual. 3 different diameters: 50mm OD - 41.1mm ID, 70.3mm OD - 53.5mm ID, 59mm OD - 38mm ID. Required for proper reassembly when installing new gears, pinion and or side carrier bearings. Note: use with crush sleeve pn# 7027 when replacing pn# 7021pinion bearings. Equivalent to Opel #16 04 202. Can also be used on Buick/Opel by Isuzu and most Chevette, as well as many Isuzu I-Mark rear wheel drive rear axles