Features: CNC aluminum alloy processing production, high-precision, light quality, surfaces frosting texture, beautiful. Adopts hollow designing, high strength, good stability, effectively reduce the error caused by gantry deformation. The product weight to achieve the lightest, and it can effectively reduce the whole weight of the machine. Both ends are designed with slots, fully compatible with the official gantry designs, only two fixed blocks can be replaced and installed, simple and convenient. Designed with threaded holes for gantry linear guide installation, no need to install nuts, reducing weight and facilitating installation. Specifications: Material: Aluminum Alloy Color: Black Size: 300mm/350mm(Optional) Length 300mm: Approx. 30cm/11.8inch Length 350mm: Approx. 35cm/13.7inch Package Includes: 1x Hollow-out Metal Gantry(300mm/350mm Optional) 1x Screws Kit note: Please allow 0-1cm error due to manual measurement, make sure you do not mind before you order. Please allow for slight color differences due to different monitor resolutions.