Ramptech 2' Tall x 4' Wide Spine Skateboard Ramp All materials pre-cut to exact CNC dimensions. Quick and simple to assemble. Includes step by step visual instructions Built with custom ABS Plastic (Indestructible) top surface and Ext HDO side panels, Galvanized steel coping, exterior screws. Do your homework first! check out who we are at https://www.facebook.com/Ramptech/ Very durable, exterior material. Portable,casters included, easy to move and store. Made in the USA!