This drone propeller from Jelbert is designed for 180 size drones. The original propeller was 1.5g, 100mm long and made of thin cheap plastic, so it broke easily. This product is 3D printed and designed to meet the specific requirements of drone propellers. This model is a remix of another Thingiverse design (NACA4 Propeller Generator by Okatake) and I adapted it to my specific drone propeller requirements. Its length is 110mm with a 5mm shaft hole.