Nikola Corp said on Thursday it signed a letter of intent with port trucking firm Total Transportation Services Inc for trials and possible order of 100 vehicles from the electric-truck maker.

Shares of the Phoenix, Arizona-based company surged 7.5 percent in premarket trading after the announcement.

Total Transportation is a large player at the ports of Los Angeles and Long Beach in southern California, which see up to 14,000 trucks on location in a month.

“The LOI is for 100 zero-emission trucks beginning with a four-truck pilot slated to start in the first half of 2022 and consisting of two BEVs and two FCEVs,” said Nikola.