About this 3D model

Customized version of https://www.thingiverse.com/thing:2537701 Created with Customizer! https://www.thingiverse.com/apps/customizer/run?thing_id=2537701 Instructions Using the following options: outerD = 15.0 innerD = 4.73 filament_margin = 0.92 H = 23.8 N = 10 spike_angle = 30 blade_twist = 30 $fn = 100 Category: 3D Printer Accessories