These channel ramps are designed to bridge a threshold from one surface to another. They're highly portable and lightweight and have a pivoting plate at the top so that surfaces at different levels can be easily accommodated. The working surface is coated in grit for maximum grip and durability. Suitable for overcoming thresholds of up to 3 inches (7.5cm). Ascending ramp length 15.5 inches (39.5 cm). Descending ramp length 12.75 inches (32.5 cm). Mid platform length 6 inches (15.5 cm). Internal width 5.75 inches (15 cm). External width 7 inches (18cm). Weight each 2kg. Maximum total load 47 stone (300 kg). Supplied as a pair.