Blue - $29.95 Amber - $29.95 Green - $29.95 Pink - $29.95 Qty. 1 2 3 4 5 6 7 8 9 10 Add to Cart Spinner Cap Carb Cap - is currently on backorder. You may still purchase now though and we'll ship as soon as more become available. Glass carb cap with 6 twisted channels to direct the air in a circular motion. Internal diameter is approx 1.7cm. Outter diameter is approx 3.2cm. Made in China