b' Features: This is an advanced upgrade kit for Ender 3 printers. Tried and tested upgrade kits can be installed quickly and easily, which can improve the performance and reliability of Ender 3 printers. Tl-smooth is a stepper motor driver add-on module, installed in the control board for case. One of the main reasons to install a TL straightener in Ender 3 is to reduce the salmon skin effect, which is evident on the surface of the printed material. They are mounted on the X and Y motor axes of the printer. Two NEMA 17 electrical shocks, one for installation on the X stepper motor and the other for the Y stepper motor. This is the noise level of the 3D printer. Note that some Ender 3 models have push-fit pulleys. It s easy to check which version you are using. Specifications: Product Name: CR-10 Extruder Damper Kit Working temperature: 280 Working pressure: 280 Suitable for Ender 3, Ender 3 Pro 3d printer accessories Note: The color of the connecting line is random and cannot be selected or specified Material: silicone + aluminum alloy Note: Light and different displays may cause the color of the item in the picture to be a little different from the real thing. The measurement allowed error is +/- 1-3cm. Package includes: 1Set x CR-10 Extruder Damper Kit