Made from Junk
Bottom Plate is 6.250" diameter. Bottom Hole is 3".
3 Holes around outside fits Mill Cover Plate.
Top Plate 4.5" Diameter
Compressor is 4.250 Tall
Bottom Mounts to The Mill
The Tubes Fill the Space so the Spring and Compression
Washer Cannot Move Sideways. I had to grind one Screw to Clear the spring