The Bulls have named Werner Kruger, Jacques-Louis Potgieter and Dean Greyling in their touring squad for the overseas leg of their campaign.
Kruger has recovered from an ankle injury after several weeks on the sidelines, while Potgieter (hamstring) and Greyling (leg) were also declared fit to travel.
Rudy Paige (knee) and Burger Odendaal (ankle) are included alongside Andre Warner, who will tour as a third scrum-half. Travis Ismaiel is also in the squad.
The Bulls play the Blues in Auckland on May 15 and the Chiefs in Rotorua on May 22 before they move on to Australia.
They then face the Brumbies in Canberra on May 29 and the Rebels in Melbourne on June 6, before returning home.
Bulls touring squad: Jesse Kriel, Bjorn Basson, JJ Engelbrecht, Travis Ismaiel, Jan Serfontein, Burger Odendaal, Handré Pollard, Jacques-Louis Potgieter, Rudy Paige, Francois Hougaard, Andre Warner, Arno Botha, Jacques du Plessis, Pierre Spies, Deon Stegmann, Lappies Labuschagne, Victor Matfield, Grant Hattingh, Flip van der Merwe, Werner Kruger, Marcel van der Merwe, Trevor Nyakane, Dean Greyling, Morné Mellett, Adriaan Strauss, Callie Visagie, Jaco Visagie.