Description Freightliner Expansion Valve Block Slim Line Replaces OEM: 68012686AB Application: Freightliner Description: Expansion Valve Block Flange Rating: 1 1/2 Ton Mount Type: Block Refrigerant: R12/R134a O-Ring #1: 0011/0173 O-Ring #2: 0113/0173 Hose Inlet Size: #6 Hose Outlet Size: #12 Evaporator Inlet Size: #8 Evaporator Outlet Size: #12 Note: Flange O-Ring Style Liquid Inlet from Condenser: #6 – 3/8″ Liquid Outlet to Evaporator: #8 – 1/2″ Suction Inlet from Evaporator: #12 – 3/4″ Suction Outlet to Compressor: #12 – 3/4″