The MCS Alloy Spacer Kit comes with a single 2mm,5mm, and 10mm spacers.

Material: Aluminum
Size: 1-1/8"
Weight: 1.7 grams / 0.06 ounces for the 2mm
              4.1 grams / 0.15 ounces for the 5mm
              8.2 grams / 0.29 ounces for the 10mm