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Bob's Knobs FPI FPI Protostar secondary
$27.95
Bob's Knobs for FPI Protostar Secondary: Precise and Convenient Collimation Specially Designed for FPI Protostar: Tailored for FPI Protostar secondary assemblies that use a 8-32 x 1 inch long set...
Bob's Knobs Starmaster 12.5 and 14.5 4-screw secondary
$27.95
Bob's Knobs for Starmaster 12.5" & 14.5" Telescopes: Precision Collimation Made Easy Enhance Collimation: Achieve precise collimation for your Starmaster 12.5" and 14.5" telescopes with Bob's Knobs. Our secondary knobs...