3" plastic ball shells. (actual size is 2-5/8"). 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. If you buy 12 sets, you get 1 rounded half and 1 with 1/8" fuse hole.
