MOROSO SPARK PLUG INDEXING WASHERS - MOR-71910

Designed for use on all 14mm spark plugs with 5/8" hex. With three thicknesses in each package, one will correct the electrode placement on any plug and simplify the time-consuming task of spark plug indexing. The washers are precision stamped from copper for perfect sealing and heat transfer. 30 per pack, 10 each size .040", .050", .064"Flat seat