Redfield Top 2-Screw Split Rings. 1", 26mm, and 30mm.

1” Ring Heights:
Low .152"
Medium .272" (for 44-50mm objective diameters)
High .402" (for 50-56mm objective diameters)

26 & 30mm Ring Heights:
Medium .394"
High .492" (for objective diameters up to 56mm)

Packaging may vary.