Buy a Metal Spacers Online spacer assortment kit and save money over buying individual packs, then replenish as needed. This kit includes 150 pcs of 1/2" outside diameter x 1/4" inside diameter in 15 different lengths. 1/8" long 10 pcs. 3/16" long 10 pcs, 1/4" long 10 pcs, 3/8" long 10 pcs, 1/2" long 10 pcs, 5/8" long 10 pcs. 3/4" long 10 pcs, 13/16" long 10 pcs, 7/8" long 10 pcs, 1" long 10 pcs, 1-1/8" long 10 pcs, 1-3/16" long 10 pcs, 1-1/4" long 10 pcs, 1-3/8" long 10 pcs, 1-1/2" long 10 pcs