OHA2275 Features: * H.D. stair glides * Wheel Diam: 10 in * Wheel : 4 in * Wheel Type: Pneumatic All-Terrain * Load Cap.: 600 lb * Base Plate: 8 x 18 in * Handle Type: Vertical Loop * Material: Aluminum Specifications: * 18 inch wide extruded base plate * Exclusive 15 inch wide frame with 2 1/4 inch cross bars, more front surface coverage to protect your load