Our Lab utilizes Environmental Protection Agency Certified Technicians. U.S. Department of Transportation Inspected and in full compliance with all Hazardous Materials Shipping & Handling regulations. E.P.A. Refrigerant Sales Restrictions apply. Sales allowed only to E.P.A. Certified Technicians, However, purchases for resale or purchases to supply certified technicians with the product do not require any certification. If you purchase any products from us, you are affirming one or the other. No returns on any refrigerant due to change of possession and liability concerns and hazardous materials shipping requirements. All the products listed on this site are in stock and ship the same day if purchased by 12:00pm central standard time.