4020 radial fan guard specifically for Creality CR-10S Pro, working with stock fan duct and its variants. Also works perfectly with Hero Me 4020 air pipe/fan duct。 Mount with 2x M318 screws 1x M320 screw bolts are needed in case of Hero Me 4020 fan duct (or other similar set-ups) 4020_radial_fan_guard_v2.STL is the one working with those fan ducts. 4020_radial_fan_guard.STL is not tested in any real application, use with care. Tested printing with 0.2 and 0.1 resolution, vertically and horizontally on hot bed. Printing horizontally on the bed with higher resolution is highly recommended. You need more details for this;-) Turbine blade is modified from this make: