Octagonal drawer or cabinet pull knob. 2 sizes, a smaller one and a more standard sized one. Models are threaded for either SAE 8-32 machine screws or M4-.7mm bolts which are the standered size of most common hardware.
Printed with a .6 nozzle and a .2 layer height with 30% infill. Should print fine with a .4 nozzle but I would recommend printing with 3 walls for durability. Smaller knob uses around 4g and larger uses around 5g of filament.
The author hasn't provided the model origin yet.