PRODUCT DESCRIPTION: Caulking gun type applicator that's designed to accept the refill Foam canisters of foam. Since these canisters are fully pressurized, minimum amount of effort is needed to operate this tool. Simply attach a can of Foam and start to apply it where needed. The great thing about this gun is that it features a built in tip shut off that makes for precise control of when material is started and stopped. This model is a bit longer than the standard basic gun – about 10 inches long – so it's better suited for hard to reach cracks and crevices. It's also lightweight and won't become tiresome to use during tedious and awkward applications.