H&K International (HKINA) Controller E-4-3-156. This E-4-3-156 controller is a genuine OEM replacement part designed for H&K International restaurant equipment. It is engineered to meet the exact specifications required for reliable operation in commercial kitchen environments. The part is ideal for maintenance technicians and restaurant owners needing to restore equipment functionality. 6.0 x 5.0 x 4.5 inches.