Type: Monocular
Extension ring lengths are 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 15mm, 20mm
Outer diameter: 60mm
Pitch: 0.75
External thread length: 3mm
4 mm - internal thread length is 3 mm
5 mm - internal thread length is 4 mm
6mm - Internal thread length is 4.5mm
7mm - Internal thread length is 5.5mm
8 mm - internal thread length is 6 mm
9 mm - internal thread length is 7 mm
10-20mm internal thread length is 8mm