Axle to crown height: Measured at 160mm (varies according to set length of travel)

A2 Stainless

but we suspect a High Carbon Steel is used for all the drivers with a plastic and silicone handle

gives you more of what you need

3mm on leading edge

Enduro ACB 4545 Angular Headset Bearing - 37mm - 49mm - 7mm - 45/45 - Stainless Steel Ignore Wholesale Tier 2 Brand Rule Axle to crown height: MeasuredACB 4545 1125 BO 1 1 8' Black Oxide Angular Contact Headset bearing (30. 5 x 41. 8 x 6. 5mm: 45x45 deg) Angular contact headset bearing featuring anti corrosion Black oxide Magnetite coated 52100 High Carbon Chromium alloy races paired with grade 10 Balls. Black Oxide coating provides an extra level of corrosion resistance and extended worry free performance The Enduro line of angular contact headset bearings start with Black Oxide treated Chromium