Note that in the 2010's era (PT. KAI era) Business class uses gray doors. Business class (K2) is a class of train service in Indonesia that offers comfort between economy and executive class, with a capacity of 64 seats per carriage. The soft seats can be rotated facing each other, equipped with air conditioning, power outlets, and luggage compartments. However, they generally lack reclining seats and are becoming increasingly rare, replaced by newer models.