Climbing ropes have always been one of the most popular and standard pieces of equipment for overall improvement of physical fitness and muscle tone, particularly for upper arms and shoulders. Trains strength, grip, and arm coordination skills for physical education, wrestling, and gymnastics. Spotting, supervision, and landing mats are required for safe use. 1 12' diameter polyplus ropes feature an extra strong, lightweight polypro core with a soft and durable polyester outside jacket layer, similar to the feel of cotton or dacron. To order Climbing Rope accessories Safety Cable Rope Hoist I Beam Clamp for 3 12' to 8' Flanges I Beam Clamp for 8 12' to 12' Flanges Wood Beam Clamp 4' x 8' x 12' Landing Mat 5' x 10' x 12' Landing Mat 6' x 12' x 12' Landing Mat