The TL-Smoother is an addon ule for 3D printer stepper motor drivers Lower vibration lower noise smoother result The board provides flyback diodes (freewheeling diodes) for the motor outputs Also protected against induction voltages in the unpowered state of the driver You will got smoother movement especially on the delta-style 3Dprinter under DVR8825 stepper drivers and A4988/2 drivers Colour: black Material: PCB board Package Contents: 5 x Stripper 5 x DuPont lineOnly 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.