Package Include: 24pcs 4040 Corner Bracket Connector Black, M8 Nuts and Screws x48pcs, Wrench x1pcs SeekLiny is specialized in aluminum extrusion, aluminum extrusion hardwares. Find 2020/2040/3030/4040 aluminum extrusion and accessories from us! This 4040 corner bracket black is suitable for 4040 aluminum extrusion v-slot and t-slot. And some 8020 aluminum extrusion also can use it(check the size in advance). 4040 corner bracket angel black is widely used for 3D printer frame parts, shelf brackets, cnc machines and self project spare parts. About this 3030 hardware, please refer to the size picture of the 3030 corner bracket. 24pcs Seekliny 4040 Aluminum Extrusion Corner Bracket 4040 Hardware V-Slot Accessories T-Slot With Screws For 8020 Aluminum Profile 3D Printer Accessories Black