Use spacers to adjust Kwik Klamp height. Spacers can be stacked for additional clearance; each spacer is 3/4" deep (e.g., two stacked would provide 1-1/2" of clearance). Spacers have centered holes for fasteners. Order spacers by outside diameter of pipe; these spacers are for use with 1" Kwik Klamps. Sold as a pack of 10. Imported.