Features: brand new and high quality The TL-Smoother is an add on module 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 drivers Package Includes: 1 Set x TL-Smoother Specifications: Item: V1.0 TL-Smoother for: 3D printer Stepper Motor Drivers Colour:Black Material:PCB Board Size: approx 4x3cm/1.57x1.18in Cable Length:approx 21cm/8.27in note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.