Fangrui Product Details Portable Ramp: The Environmentally Friendly Plastic Materials Easy To Move, Easy To Store And Easy To Store, Small In Size, Light In Weight, Good In Abrasion And Compression Resistance, Not Taking Up Space For Storage Anti-skid Material: Stripes Pattern Design, Safe And Non-slip, Supports 1.5-1.9cm Threshold, Prevents Machine Wheels From Getting Stuck, Greatly Improves Pass Rate Easy To Use: Reasonable Slope, Climbing And Overcoming Obstacles As If Walking On Flat Ground, Gentle Slope Design, Suitable For More Sweeping Robots, Easy Climbing Easy To Install: Installation Is A Breeze With This Ramp Set, As It Requires No Tools And Can Be Set Up Quickly And Easily, Providing A User-friendly Experience For All,portable Ramps For Wheelchairs Wide Application: Plastic Threshold Ramp Suitable For Curb, Home Garage, Loading Dock House Driveway Use They Are Ideal For Garages, Warehouses, Barns, Shops And Stores Notes:1. Place The Whole Piece Close To The Edge Of The Threshold At The Pre-installation Position Of Easy To Clean And Maintain