Thresh 4 Size: 4" Features: -Threshold Ramp.-Lightweight yet durable free-standing ramp.-Made of anodized aluminum.-Non-skid surface.-Modular design.-Designed for doorways, sliding glass doors and raised landings.-Ideal for use with wheelchairs, walkers and cane users.-Intended for indoor or outdoor use.-Available in 2 - 8 foot lengths.-Weight Capacity: 800 lbs.. Dimensions: -34" wide and easily accommodates thresholds from 3/4" to 6" high. Warranty: -Warranty: 3 Years.