Optima eBOOST Injectors is a professional AC/R chemical tools for the treatment of AC/R units. They are intended to treat AC units of up to 6 tons. Every injector comes with clear hoses adapters for easy use. They are proven to be safe and effective for all systems. Every model comes in a color-coded, trilingual ( English, French, Spanish) sealed clamshell packaging to easily distinguish every type. With OPtima eBoost injectors you will get fast results in a very easy way.