Eisco labs 3.875″ Diameter Closed ring with Boss head clamp.
Plated mild steel with 5/16″ diameter stem, with open boss head fitted with thumb-screw to accept rods from 5/16″ to 5/8″ mm dia. Extension distance from boss head to ring is approx. 7/8″, Outside diameter of ring 3 5/8″ Clamp from Boss head center line measures 5/8″ to edge of closed ring.



































