TKS de-icing fluid complies with AL-5 DTD406B and is approved by British Aerospace. Aviation Laboratories aircraft wing de-icer is approved for all TKS systems. Diamond aircraft, HS-125 Hawker, Cirrus, Beechcraft, Cessna, Piper, Mooney, Kodiak, Hawker and many other aircrafts are equipped with the TKS weeping wings de-icing systems. TKS wing deicer is sold by the case, pail, and drum and accommodates all users from individual pilots and their aircraft to fleet managers and their growing fleets. TKS wing deicing fluid is tested before and after blending and undergoes strict quality control. Filtered to 1 micron. Certificate of analysis and strict lot control. Each case contains two 2.5 gallon pails. Price shown is for two 2.5 gallon containers. PLEASE call for AIR DELIVERY shipment rates. AIR DELIVERY WILL BE ASSESSED HAZMAT FEE OF $37.50 PRIOR TO SHIPMENT.