Model: SCTM-27 30mm Diameter, Low Profile 23mm 0.9 inch from Base to Ring Center, 4 Screws per Ring, CNC Made Model: SCTM-22 30mm Diameter, Medium Profile 25.4mm 1.0 Inch from Base to Ring Center, 4 Screws per Ring, CNC Made Model: SCTM-08 30mm Diameter, High Profile 31mm 1.2 Inch from Base to Ring Center, 4 Screws per Ring, CNC Made
