TheOneUp EDC Top Cap Kit includes the worlds lightest headset top cap (4.2g), and an EDC steerer plug with drain hole which keeps crud out of your steerer. Top caps are compatible with all 1-1/8" aluminum steerer tubes. The EDC steerer plug is required for EDC tool storage and is compatible with most aluminum tapered steerer tubes. OneUp EDC Top Cap Kit Features EDC TOP CAP EDCsteerer plug 2x 1mm, 3mm, & 5mm Headset Spacers INSTALL THE EDC TOP CAP You need a minimum of 5mm of headset spacer above the stem and your steerer tube should be 1-2mm below the top of this spacer. Apply a small amount of grease to your newly cut thread and screw in your new EDC top cap. The Top Cap interface uses a standard cassette lockring tool ... More info