Genuine SRAM DUB bottom bracket bb axle spacers. These are to fit between the bottom bracket bearin and your crank arm.
takewell DUB Bottom Bracket Spacer for SRAM DUB Bottom Bracket Installation, Aluminum, Black, 1 PCS, Width: 3 mm. The Aluminum Alloy Spacer Replaces Plastic Spacer.
SRAM DUB Bottom bracket bearings Truvativ 30x40x6 / 30x40x7
SRAM DUB Bottom Bracket Preload Adjuster Kit with Outer & Inner Rings
Sram DUB Bottom Bracket Preload Adjuster Kit
Sram DUB Bottom Bracket Spacer Kit MTB/Road 17pc - 2-10.5mm & BSA 68 AL Spacers