The RAM-B-125BU, curved extension base includes a 1″ rubber ball, allowing for near-infinite adjustment and perfect viewing angles. Originally designed
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.
This Federal Aviation Administration (FAA) Flight Instructor Helicopter Airman Certification Standards softcover book (ACS-29) supersedes the Practical Test Standards (8081-16B),