- Knobs: Black plastic, 30 mm (1-1/4”) diameter, 5-point fluted
- Threads: Plated steel
- Knobs: Black plastic, 25 mm (1”) diameter, knurled
- Threads: Stainless steel
- If your primary looks different from our photograph, or already has factory collimation knobs, these knobs will not fit.
- The telescope optical tube assembly will clear the rocker box with primary knobs installed.
- Primary adjustment knobs are slightly larger than shown in the photograph and do not have an orange insert.