This product ships unassembled and is setup for user-supplied M5 mounting hardware (M6 with 21.5mm PROVer spacing).
*Product Fitment Notes: Prior to ordering, please verify that your current Y-axis table uses T8 ACME Lead Screws with 2mm pitch and 4mm lead. Also verify your existing nut seat spacing – our 3018-PRO machines (and many clones) feature a 22.5 mm offset from the base of the Y-axis table, to center of nut seat. Some machines like the 3018-PROVer feature a 21.5mm offset while the 3018-MAX (all metal machine) features a 24mm offset. We now offer this product in Blue, with M6 mounting and 21.5 mm spacing option, to accommodate owners of SainSmart Genmitsu 3018-PROVer machines. And we offer it in a 24.0 mm variation to accommodate our 3018-MAX customers. Attention: the lead screw in our product photos shown for context and is not included with this purchase.