Rosberg, Ricciardo and others trial Halo at Spa

Why the Halo was delayed until 2018 (2:00)

Craig Scarborough joins Jennie Gow to discuss why the Halo protection system will not debut in 2017. (2:00)

SPA-FRANCORCHAMPS, Belgium -- The Halo cockpit protection device has been rolled out by four teams on the opening morning of practice for the Belgian Grand Prix.

Though it has been scrapped for next year, the device continues to be at the forefront of the FIA's plans for 2018. Motorsport's governing body wants every driver to sample the device, with further tests confirmed for Lewis Hamilton and Sergio Perez in Monza ahead of next weekend's Italian Grand Prix.

On Friday morning, Nico Rosberg (Mercedes), Daniel Ricciardo (Red Bull), Carlos Sainz (Toro Rosso) and Nico Hulkenberg (Force India) took to the Spa circuit with the device bolted on their cars. Rosberg appeared to a lap close to full capacity at the end of his first run with the device, before pulling into the pits.

None of the drivers appeared to have any major problems negotiating the Eau Rouge corner, which sweeps uphill and over a blind crest. See pictures below for each car.

Rosberg's Mercedes:

Ricciardo's Red Bull:

Sainz's Toro Rosso

Hulkenberg's Force India: