Bob's Knobs Celestron SCT 5” f/10 metric (black oxide)

Bob's Knobs for Celestron SCT 5” f/10 Metric: Precision Collimation Simplified Specifically for Celestron SCT 5" f/10: Designed for Celestron 5” (13 cm) f/10 SCT models (C5, NexStar 5SE, Omni 127) with black Phillips factory collimation screws featuring metric threads. Part Options - Part: C5metBO and C5metSS: Telescope Compatibility: Fits Celestron 5" f/10 models with black Phillips metric collimation screws. Not suitable for scopes with silver factory screws. Knob Variants: Available in black oxide steel (black) or stainless steel (silver), each 12 mm (1/2”) in diameter for comfortable use. Thread Material: Choose between black oxide or stainless steel threads for a perfect match with your telescope's screws. Model Year and Screw Length Considerations: Model Year Compatibility: Fits only 2006 and later C5 models with black Phillips screws. Earlier or other models require standard knobs (refer to Item A). Screw Length Note: Some C5 models have 10mm long metric screws. If