Item Type: Joining Plate Material: Aluminum alloy Number of Holes: 5 Color: Silver ModelThickness(approx.)Hole diameter(approx.)Hole distance(approx.)Length(approx.) 2020L Shape4mm or 0.2in5mm or 0.2in20mm or 0.8in60mm or 2.4in 3030L Shape4mm or 0.2in6.5mm or 0.3in30mm or 1.2in90mm or 3.5in 4040L Shape6mm or 0.2in8.5mm or 0.3in40mm or 1.6in120mm or 4.7in 1Widely used in construction industry aluminum frame structure, 3D printer, CNC router, CNC laser cutting machine, robot project 25-hole placement is designed for vertical joints, very practical 3Infinite positioning possibilities to achieve maximum flexibility in your own design 4The main parts are made of aluminum alloy, strong and durable 5Using advanced technology with excellent craftsmanship to bring smooth surface, which will not hurt your hands in work4 x Joining Plate