New Version:

UNAVCO Fixed-height 0.129m and .251m spike mounts
(the exact measured height may be stamped on the mount)

For orders, contact:

N/A

The machine shop that use to make them is no longer in business.

Diagrams (Solid-works)  are in the attachment below.

Old Verson:

UNAVCO Fixed-height 0.18m Spike Mount