On February 18, 2000, blended winglets were announced as an option for the Boeing 737-800; the first shipset was installed on 14 February 2001 and entered revenue service with Hapag-Lloyd Flug on 8 May 2001.[22] The Aviation Partners/Boeing 8 ft (2.4 m) extensions decrease fuel consumption by 4% for long-range flights and increase range by 130 or 200 nmi (240 or 370 km) for the 737-800 or the derivative Boeing Business Jet as standard.[2] Also offered for the 737 Classic, many operators have retrofitted their fleets with these for the fuel savings.[citation needed] Aviation Partners Boeing also offers blended winglets for the 757 and 767-300ER.[23] In 2006 Airbus tested two candidate blended winglets, designed by Winglet Technology and Airbus for the Airbus A320 family.[24] In 2009 Airbus launched its "Sharklet" blended winglet, designed to enhance the payload-range of its A320 family and reduce fuel burn by up to 4% over longer sectors.[25][clarification needed] This corresponds to an annual CO2 reduction of 700 tonnes per aircraft.[26] The A320s fitted with Sharklets were delivered beginning in 2012.[27][28] They are used on the A320neo, the A330neo and the A350. They are also offered as a retrofit option.[28][29]