The Ultra Blue Chemical Spray is the upgraded version of the G9 sprayer. Upgraded poly coated O rings and piston cups help with a chemical resistance for a longer durability. Meaning you can now use any of your favorite heavy duty cleaners or acid base cleaners with the Ultra Blue Chemical Sprayer. Designed close to the specs of the G9 so the comfortable grip & design is still there. Also Developed with a adjustable tip for mist spray down to a straight stream spray. The Ultra Blue Chemical Sprayer also has a 28/400 neck fitting so it works great with the normal spray bottle or any of our Bee-Hi Bottles.