Malaysia Airlines has placed an order for 10 Boeing 737 MAX 10 aircraft – the new high-capacity version of popular single-aisle jet.

The deal, which is valued at US$1.25 billion at current list prices, was agreed at the Paris Air Show, where Boeing launched the 737 MAX 10 earlier this week. The order is actually a conversion of 10 existing 737 MAX orders placed by Malaysia Airlines in 2016.

“We are very excited to announce our conversion of some of our 737 MAX 8s to 737 MAX 10s,” said Peter Bellew, managing director & CEO of Malaysia Airlines. “As competition and our business continue to grow, the superior efficiency and additional capacity of the 737 MAX 10 will allow us to keep differentiating ourselves and offer the best all-inclusive business and economy fares.”

The 737 MAX 10, which will be rolled out in 2020, will be capable of seating 230 passengers in an all-economy class layout. Malaysia Airlines’ version however, is expected to feature a two-class layout with 188 seats – 26 more than the 737 MAX 8.

Following its launch in Paris, the 737 MAX 10 is already proving extremely popular with airlines; United Airlines, Lion Air, Okay Airways, Ryanair, Copa Airlines and Xiamen Airlines are among the carriers to have placed orders for the aircraft, along with several leasing companies.

In 2016, the Malaysia’s national carrier announced an order for 25 737 MAXs.