... 1.It is uniqueness,have two gear transmission system each mirror,can 360 degree rotate,all direction. 2.Have a ... .It is uniqueness,have two gear transmission system each mirror,can 360 degree rotate,all direction.2.Have a ... 15.5mm-22mm,all fit is good.4.Durable NYLON plastic,more safe,more hard.5.More sight field,use ... Environmentally friendly materials.can pass SGS testing report, HANDLEBAR MIRROR