HA-36 - Stereo Adaptor Jack Adapter 3.5 mm plug to 6.3 mm stereo inline jack. HA-36 = 3.5 mm, stereo NTA-172 = 3.5 mm, mono MONACOR UK LTD - U8, PLOVER CLOSE, NEWPORT PAGNELL, MILTON KEYNES, MK16 9PS - MONACOR.CO.UK