40 Pack, Plastic, Shim, Plumb, Space & Level, Assorted Colors, 10 Each Of The Following: 1/4" Blue, 1/8" White, 1/6" Red & 1/32" Green, Can Be Used In Virtually Every Construction Application & Are Easily Removed For Use Over & Over, Shims Can Be Cut To Fit, Compression Resistant Re-Usable Material That Will Not Rot, Countersunk Holes For Securing With Screws Or Nails.