Formula 1 teams are said to be surprised with the high cost of the controversial 'Halo' safety devices that will become mandatory for 2018.
Although unpopular among many drivers and fans, the partial cockpit cover must be fitted to every car from next year.
According to Auto Motor und Sport, three external companies have applied to the FIA to be able to supply Halo to teams in Formula 1, Formula 2 and Formula E.
The publication claims that many teams are already concerned about the price of Halo, with a single device estimated to cost somewhere between £11,000 and £21,000.
"It will be expensive," said Force India technical boss Andy Green. "We not only have to order Halos for the cars, but also for the FIA load tests."