Block type expansion valve. Replaces Carrier # 68 000 024. Used in bus ac systems. Liquid inlet 3/8", Liquid outlet 1/2", suction inlet 1/2", suction outlet 5/8". We sell more than bus air conditioning parts. Please browse our store for all of your shuttle bus parts needs. We carry the most commonly used air conditioner compressors for shuttle bus applications. Check out our ac compressors.