CRL 1/16" x 3-1/2" shimstack shims give you fast, low cost leveling. 16 heat-sealed pieces make up each one-inch stack. Simply snap off individual shims to get the thickness you need. With so many available sizes, Shimstack Shims can be used to align windows, doors, curtainwalls, storefront tubing and other architectural components. These shims are light in weight yet durable.
Shimstacks are made of black fire resistant, non-staining, high-impact plastic with an ASTM rating of 5000 p.s.i. compressive strength.