1- 3/8″ Wye Fitting, PN: 5463K722.
This wye fitting takes the two 1/4″ tubes into a single 3/8″ exit tube for venting capabilities on the ETX900-TSO or ETX900-VNT lithium aircraft batteries. This does not work with the ETX680-24-VNT or the ETX680-24-TSO battery.