The Round Spacers are available in Aluminum, Brass, Nylon material , the clear holes for #4, #6, #8, & #10 screw sizes .
Aluminum Spacers could be with anodized or Clear Iridite finish .for the brass spacers could be with nickel finish or zinc ,chrome plating .
There is also have hex spacers or square spacers for your choose ,we will try our best to meet your requests.
Round Spacers used wildly in Electronic .