Check the listing for details. Allstar Performance ALL64458 Shock Shim - Semi-Solid - 1/8in Thick - Plastic -. Condition: New. Listed at 13.29 USD. Uniquely designed shock shims are placed directly onto the shock shaft to simplify fine tuning of the chassis without disassembling the shock or even removing the shock from the chassis. Kits include a variety of shim designs and sizes for convenient tuning and set-up. Semi-Solid Shims -Designed for quick instal lation and removal providing a secure installation that will not fall out yet requires 3/4" of space to in stall or remove. Typically installed when the vehicle is off the ground. Commonly used for fine tuning the suspension.;.