These CRL Stainless Steel 1/8" (3.2 mm) Thick Spacers solve the problem on construction projects where uneven substrate attachment is needed for RS0B Standoffs. Spacers are available in two different thicknesses to allow for minor adjustment, and can be stacked for best fitment. They are also the same base metal as the railing standoff bases, so corrosion is minimized. Minimum order is 1 pack of 10.