- Aluminium stem shaft cap keeps dirt and mud out to prevent rust inside of the stem shaft. - Made of A7009-T6 aluminium and lightweight design. - Laser-printed Zeta logo. - Leaf springs hold inside of stem shaft and won't come off, even in hard riding. - Fits shaft inner diameter from 13–17.5mm. - See fitment guide or parts finder to ensure suitability for your make, model, year.