Boeing (NYSE: BA) and Air Lease Corporation (NYSE: AL) announced an order for six 737 MAX 8s at the 2016 Farnborough International Airshow.

Three of the orders are new, and three were previously attributed to an unidentified customer on the Boeing Orders & Deliveries website. The order is valued at $660 million at current list prices.

“ALC already has lease agreements in place with seven different airlines for 737-8 MAX aircraft out of our Boeing delivery stream, starting in the fourth quarter of 2017,” said Steven F. Udvar-Hazy, Executive Chairman of Air Lease Corporation. “The addition of more Boeing 737 MAX in our portfolio undoubtedly provides the economics, innovative efficiencies, and enhanced passenger experience that our airline customers are looking for in an aircraft.”

With 180 airplanes now on order, ALC has the largest backlog of any Boeing leasing customer. ALC also has the largest 737 MAX backlog of any leasing customer with 118 orders.

“ALC was one of the first leasing companies to order the 737 MAX, and we appreciate their continued confidence in the airplane,” saidBrad McMullen, vice president of North America and Leasing Sales, Boeing Commercial Airplanes. “We’re thrilled to see ALC place the MAX with airlines all over the world.”

Boeing press release