6" plastic ball shells. (actual size is 5-5/8") ring & washer included per set. comes in 2 halves. One half is just smooth round, the other half has a 1/8" fuse hole, perfect for our chinese fuse. Use Methylene chloride, xtlene or PVC cement to bond the 2 pieces together. All sets come with both halves. 4 SETS
