Construction: Stainless; Other Info: Secure stainless wire gates with slide-to-lock feature. Three sizes: #2 (1.1" x 1.7" x 0.1") Weight rating: 10lb; #3 (1.5" x 2.4" x 0.1") Weight rating: 25lb; #4 (2.0" x 3.1" x 0.1") Weight rating: 75lb. Manufacturers Warning: Not for use where disengagement could result in bodily injury or property damage. Not for climbing. Hang Packaged.