All include 10mm RH threaded adapters for mounting to most Japanese bikes, as well as 5/16 in. -18 bolts for mounting to Harley-Davidson. Most Japanese motorcycle with thread-in mirrors use 10mm RH threads. Many Yamahas use 10mm LH threads for the right-hand mirror.
Mirror length (overall): 5 3/8 in.
Mirror length (glass only):4 3/8 in.
Mirror height (overall): 2 3/4in.
Mirror height (glass only): 2 3/16 in.
Stem length: 7 in.
Stem offset: 3 1/4 in.
Part 391811 fits the following machines