JUSTHANGIN' Anodized aluminum y-stepper housing significantly absorbs and conducts heat away from the y-stepper motor into the long 40x40 y-axis aluminum extrusion without the need to adjust the VREF voltage on the control board. Extremely hot running stepper motors can skip steps and have shorter life spans. The kit includes the main housing, cover, stepper screws, adjustable y-limit switch, 2 M4x8mm screws, and M4 t-nuts. Installation is simple and can be completed in 10 minutes. Scannable installation video QR code included.