12mm OD x 10mm ID

nuts included

as a backpack

you can use the included black round cover

Reducer sleeve for smaller headers included

micro bullet blinkers led krom Lens color:Tinted 12mm OD x 10mm IDSMP Classic Bullet Mini LED Motorcycle Turn Signals The SMP Classic Bullet turn signals offers a bright LED light for front or rear turn signal use on your motorcycle. Classic styling that looks great on any custom motorcycle. With E approval. Features: Vision Power LEDs: Exceptional brightness in a classic bullet design E approved for both front and rear use Removable turn signal stem for flush mounted applications For 12V electrical systems