Batsmen Clint Hinchliffe and Josh Philippe, along with towering quick Alex Bevilaqua have been selected in the national squad.
Hinchcliffe and a further five squad members - Victoria's Travis Dean and Sam Harper, South Australia's Michael Cormack, and Tasmania duo Mac Wright and Nick Buchanan - played in this summer's JLT One-Day Cup.
Western Australia keeper-batsman Josh Philippe was included after scoring 88 for a Western Australia XI against England in November.
Bevilaqua earnt the call-up after consistent performances in the Toyota Futures League over the past few months.
Cricket Australia National Talent Manager and National Selector, Greg Chappell, said:
"We wanted to field as strong a side as possible, and it's pleasing to have a number of players involved with first-class and domestic one-day experience," Chappell said.
"On the batting front, Travis Dean and Jake Doran both have first-class hundreds to their name, while a number of up-and-coming players such as Clint Hinchcliffe and Jake Winter also get a chance to shine.
"Josh Philippe from Western Australia impressed in his last match against England, when he scored 88, and he will take the gloves, allowing Jake Doran and Sam Harper to focus on their batting.
"Gabe Bell is a young player who has performed well in the Sheffield Shield this season, and this is a great opportunity for him, while there is plenty of variety on the spin-bowling front with Clint Hinchliffe, Mac Wright and Michael Cormack."
The team will be coached by National Specialist Skills Program spin coach and Queensland Bulls assistant coach John Davison, with former Australia opening batsman Chris Rogers as his assistant.
The third Test of the Magellan Ashes Series commences on 14 December at the WACA Ground.
CA XI Squad: Gabe Bell (TAS), Alex Bevilaqua (WA), Nick Buchanan (TAS), Michael Cormack (SA), Travis Dean (VIC), Jake Doran (TAS), Sam Harper (VIC), Clint Hinchliffe (WA), Jackson Koop (VIC), Josh Philippe (WA), Jake Winter (SA), Mac Wright (TAS), Coach: John Davison, Assistant Coach: Chris Rogers