Secondary mirror cover for Hubble Optics UL18

This is a rigid cover for the secondary mirror on the Hubble Optics UL18 dobsonian telescope. The "mount" portion screws into the secondary holder using the pre-existing screw holes, and the cover simply screws on over that. Printed in PETG for heat resistance and durability. Makes me feel much less anxious about transporting the secondary cage, and keeps dust off too!