L-Smoother can effectively eliminate the mechanical vibration generated by the 3D printer motor, especially for parallel arm structure of the machine effect is significant TOSHIBA TOSHIBA chip all the stronger consistency of the diode, the signal is more stable, longer life the TL-Smoother is an addon module for 3D printer stepper motor drivers. The board offers flyback diodes (freewheeling diodes) for the motor outputs, so they are also protected against inductance voltages in the unpowered state of the driver. You will get smoother movement especially on the delta-style 3 Dprinter among DVR8825 stepper drivers and A4988 / 2 drivers. colour: blue Material: plastic Size about: 40*30mm Package Contents: 4 X filter 4 X DuPont lines Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.