The quartet includes Hyderabad's Mohammad Siraj, Madhya Pradesh's Avesh Khan, Navdeep Saini of Delhi and Kerala's yorker specialist Basil Thampi.
All these bowlers are capable of hitting the mid 140s and have performed at the Ranji, IPL and India A level.
"These four are the next-in-line bowlers after the top five who are in the Test squad. Since the pacers in the Test squad should not be put under over exertion during the net sessions, it is only prudent that the next best lot of quick bowlers are there to provide quality practice," a BCCI official told PTI.
Earlier in the day, Cricket South Africa stated that India's two-day tour game ahead of their three-match Test series was cancelled.
The Indians have instead, as per CSA, opted for training sessions on those days.
No official reason was given for the cancellation of the warm-up game but the change in schedule would mean that India will head into the Test series -- starting January 5 next year in Cape Town -- without a practice match.