CNJ Motorsport Rubber Vacuum Caps fit Tubing with 3/16″ outside diameter, and they have a 9/16″ inside length. Comes in a handy twenty (20) pack with FREE Regular Postage Australia wide with Australia Post. Contact us for Overseas Freight quotes. Tracking Number will be provided after dispatch for your reference. Please do not hesitate to contact us if you have any questions, and we will be delighted to assist you with your requirements. Please note that we may use recycled packaging to reduce our impact on the environment. Same/Next Business Day Dispatch from CNJ Motorsport, or pick up from our Underwood, Qld, 4119 store. Thank you for shopping with CNJ Motorsport.