PAIR of KegLand Ball Lock Disconnects with Duotight Fittings. High quality plastic disconnects manufactured by KegLand sold with either 5/16, 3/8 Duotight push fittings or swivel nut and barbs. Option 1: 2 x 3/8 Duotight push fittings and 2 x gas (grey) MFL 1/4" keg ball lock disconnect.