The knobs below will fit the Mag1 Portaball secondary with three or four collimation screws. Price is for a complete set of knobs.
A. Knobs for Mag1 Portaball 12" Secondary
Part: PB12sec
Fits: Mag1 Portaball 12" secondary
Knobs: Black plastic, 13 mm (1/2”) diameter
Threads: Stainless steel
Notes:
- Knobs are positioned above the secondary spider.
- Screw tips are beveled to fit into the secondary mounting plate recesses.
- Three knobs are included for the price listed below. If your secondary has four screws, email us after placing your order and we will include a fourth knob free of charge.
$27.95