Tom Court, Chris Henry, Paddy Wallace and Dan Tuohy will all be available for Ulster’s RaboDirect PRO12 trip to Cardiff this Friday.
The players will be released from the Ireland squad but fellow internationals Stephen Ferris, Andrew Trimble and Rory Best remain unavailable for selection.
Ulster’s squad will contain a mix of youth and experience, with Henry taking over the captaincy in the absence of Johann Muller through injury.
The 27-year-old led the side admirably when Muller and Rory Best were on World Cup duty earlier in the season.
Muller will miss a second consecutive match following the calf injury he picked up last week in training, while Ali Birch is the only fresh injury concern after he picked up a knee problem in Friday’s win over Dragons.