This Kidco(R) 24" baby gate extension makes it easy to build your own custom barricade! It"s compatible with Kidco"s Auto Close ConfigureGate(R) and Auto Close HearthGate(R), and you can add as many extensions as needed for your specific space. Made of sturdy steel; 31"H. Kidco gates sold separately. Gate extension is made of heavy-gauge, tubular steel, with a heat-resistant resin finish There is no limit to how many extensions you can add