Absolutely brilliant mirrors. got these for my Triumph Street Triple after searching for an eternity, very nice finish and build quality, easy to fit (come with two adaptors included if needed) 30mm internal diameter as standard out of the box so fitted directly onto my R&G bar ends to which was a bonus, and a bargain as the pair cost less than one of the Triumph OE offerings. Look really nice on the bike and have an OE quality and feel, a decent mirror size (120mm x 85mm) unlike most i had seen which are way too small, look daft and out of proportion plus don't give much of a rear view which defeats the object in my opinion. Recommended 100%