The STX 20/20 Pro Lacrosse Cage Kit comes with everything you need to be fully protected for box lacrosse. This is a senior (adult) sized cage kit and will fit almost all models of lacrosse or hockey helmets. The STX box lacrosse cage kit also includes all the mounting hardware to install on your helmet. This is the pro STX cage model, but does have a very small curve at the bottom. NOTE: the STX 20/20 cage no longer comes wirth the Adams 4 point chin strap as pictured; you will receive an OTNY chin strap (as pictured in the second photo).