Rod end: Slot injection type Advantage: more strong, more life time MaterialTreatmentSurfaceBodyCabon steelheatedzinc plated, black oxide, hard chrome platedAlloy steelheatedStainless steel passivatepolishingAluminum anodizedanodized in clear, red, blueBall52100heatedhard chrome platedStainless steel heatedoptional hard chrome platedRacecarbon fiber reinforced Nylon with PTFEinjectioncolor of red ...