Midwest Optical Bi1450-30.5

Midwest Optical SU25.5-30.5, Step-Up Ring, from M25.5 x 0.5 To M30.5 x 0.5, 32 mm Outer Diameter, 22.5 mm Clear Aperture

Midwest Optical SU27-30.5, Step-Up Ring, from M27 x 0.5 To M30.5 x 0.5, 32 mm Outer Diameter, 23 mm Clear Aperture

Midwest Optical SD34-30.5, Step-Down Ring, from M34 x 0.5 To M30.5 x 0.5, 36 mm Outer Diameter, 30 mm Clear Aperture