MIAMI — Air Algerie agreed to buy two Boeing 737-700 Convertibles on Wednesday in Farnborough. The $152 million list price order positions the African carrier to be the airline launch customer for the unusual 737 sub-type.

“The 737-700C will provide our fleet with flexibility, and enhances our ability to carry cargo on important routes,” said Mohamed Salah Boultif, chief executive officer of Air Algerie.

The 737-700 convertible, or 737C for short, is a sub-type of the existing 737-700 aircraft that can easily alternate between passenger and cargo configurations. According to Boeing, the airplane features strengthened wings, a cargo-loading door on the main deck, and a built-in cargo handling system on the floor that enables the jet to carry 40,000 pounds of cargo.

Should the carrier need to utilize the passenger configuration, the airplane can seat up to 140.

The airline currently operates a fleet of 46 airplanes, including 22 Boeing 737 -600s and -800s. It also maintains three 767-300s.