Pro-werks Square Drive Billet Aluminum Bottle Valve Knob

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The Better Square-Drive Knob Get a solid grip on that bottle with a Pro-werks’ Bottle Knob. This lightweight, all-American solution features deep comfortable finger notches, and th ey match the rest of the Pro-werks’ line up of signature Easy Turn Fill Caps and aluminum Knobs Starting with American melt, aircraft-grade 6061-T6 aluminum; we precision machine each knob on one of our multi tasking MAZAK CNC machining centers, then finish them in your choice of anodized black, or silver colors; and our popular micro-polished aluminum finish. Measure the square drive on your bottle Available in two different square drive sizes to accommodate valves commonly found on most Co2 Bottles and Nitrous Bottles. For proper selection, we recommend you remove your original knob and measure the "square drive" of the bottle valve to confirm your size before ordering. Show more