100mm E-step Calibration Tools

One piece extruder E-step calibration tools for 1.75mm and 3mm filament diameters.

100mm length with graduation marks every 5mm/10mm.

Tunnel has a sinusoidal tilt to hold filement in place and straight while calibrating, and still allow for the tool to be attached without unloading the extruder. Slide feet on, then bend filament slightly to follow the slot. Can be attached one-handed with some practice. Tool should spin freely on filament.

Deep notches at each end allow for filament