- Eisco Labs 2.125" diameter Cast Iron Closed Ring Clamp with Boss Head
- Boss head fitted with thumb-screw to accept rods 1/2"" dia
- Extension distance from boss head to ring is approx. 1.25"
- Inside Diameter of ring 1.625"
- Clamp from Boss head center line measures 4" to edge of closed ring.
2.125" Out side diameter cast Iron 1/4" diameter Ring with Boss Head clamp , with open boss head fitted with thumb-screw to accept rods 1/2" in dia. Extension distance from boss head to ring is approx. 1.25", Inside Diameter of ring 1.625" Clamp from Boss head center line measures 4 " to edge of closed ring.