Blue Sapphire design looks great and helps reduce glare. The Stealth I,mirror has a 4 34 stem,and works great on most pullback and Ape Hanger bars. Replacement stems and reflectors are also availablre separately. Stems,fit all Stealth mirror heads plus most OEM and aftermarket OEMstyle mirror heads that thread at the mirror head. All feature familliar studstyle mounting common to other mirrors,or we supply chrome socket head Allen bolts for a new style of custom mounting. Oval head measures 5 x 2 12 right or leftside installation. Mount on 7204 HD clutch or brake lever housing and most custom mounting applications. Mirror head screws and pivots are stainless steel.