This is the main support chassis (weldment) for an automatic vibrating sand sieve machine. The frame is designed to withstand the high vibration frequencies of the screening process while maintaining structural Features:Motor Mount: Integrated mounting plate for the electric vibration ty: Includes base plates prepared for fixed industrial caster on: Supports the mesh tray assembly and directs sieved material to the discharge is part of a larger assembly. Check my profile for the specific Caster Wheels used on this frame!