Adjustment and lock screws (3 adjustment, 3 lock). Fits all Meade 10 inch (25 cm) f/5 Lightbridge telescopes. Primary knobs also fit Zhumell, GSO, and Hardin Optical 10 inch telescopes.

Note 1: The telescope optical tube assembly will clear the rocker box with primary knobs installed.

Note 2: Primary mirror springs as supplied by the factory can sag from the weight of the mirror cell. Our stainless steel replacement springs are stronger and provide adequate support to maintain primary mirror collimation. We recommend that the mirror locking screws remain in place for additional control.