The EDC 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. FEATURES: Top caps are compatible with many 1-1/8" tapered or straight aluminum steerer tubes. The EDC steerer plug is required for EDC tool storage and is compatible with most aluminum tapered steerer tubes. Includes: EDC TOP CAP, EDC steerer plug, 2x 1mm, 3mm, & 5mm Headset Spacers IMPORTANT: Specific fork fitment requirements for installation. Reference OneUp Components fork fitment guide prior to purchase Installation requires proprietary OneUp Components self aligning steerer tube tap kit to cut threads into your forks steerer tube in order to install topcap