This training equpment is all treated wood. Platforms are 4 ft. by 4 ft., lower platform is 2 ft high, and higher platform is 4 ft. high. Ramp is 2 ft. wide by 8 ft. long. Both platforms are bolted in, and ramp attached to top platform with hinges and a rod. Easy to assemble but requires at least 2 people to set up. Tunnel not included.