https://www.qspray.com/product-category/termite-equipment/termite-rods/bg-sub-slab-injector-ssi/ Pests hid everywhere, even under concrete slabs. You can't just dig it up, to spray some pesticide down. There is a easier and faster method to get at bugs and pests in hard to reach areas and the B&G Termite Sub Slab Injector is just the tool you need. There are two different lengths to choose from the SSI - 14 which is 28" or the SSI-4 which is 18", great for crawl space use or under sinks. With the Sprayer length of your selection you receive an additional 6" extension rod and two sprayer tips: 360 degree and 180 degree. It has the traditional Versatool style valve but an additional locking mechanism to avoid any chemical splash back. Visit QSpray.com where we sell all the parts you'll need to repair, rebuild or modify them for your needs. There are many other tips available for these sprayers than what comes in the box.