6 is Cane Creek Part Number BAA0080K

Shell: Plastic

Designed for use on Shimano's 12 speed wide range cassette

while the Maxle Stealth is just 37g

Axle size and style: 15 x 110 mm

Enduro ACB 4545 Angular Headset Bearing - 30.5mm - 41.8mm - 6.5mm - 45/45 - Stainless Steel PDP|PLP|Brake Rotor Type 6 is Cane Creek PartACB 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