Package Include: 12pcs 4040 Straight Connector Corner Bracket Joint Black, Screws x48pcs, Wrench x1pcs SeekLiny is specialized in aluminum extrusion, aluminum extrusion hardwares. Find 2020/2040/4040 aluminum extrusion and accessories from us! This 4040 straight connector line black is suitable for 4040 aluminum extrusion v-slot and t-slot. 4040 straight connector line black is widely used for 3D printer frame parts, shelf brackets, cnc machines and self project spare parts. About this 4040 hardware, please refer to the size picture of the 4040 corner bracket. Seekliny 12pcs 4040 Straight Connector Corner Bracket Joint Plate 4040 Hardware T-Slotted Accessories V-Slot With Screws For 4040 Aluminum Profile 3D Printer Accessories Black