You are looking at a set of 4x NEW Rubber Vacuum Block Off Caps to suit: Various applications These are approx 15mm Long x 7mm Wide with a ID of 3mm / 1/8" Made from a high quality - long lasting rubber These black rubber caps can be used for plugging vacuum lines and hoses on carburetors, manifolds and emission control lines, just about anything that uses a vacuum - please ensure you check the sizing before purchasing. We also have a range of different size caps available. Thanks for looking and don't forget to check out all of our Restoration Essentials in our store. Your parcel will have a unique tracking number which will be sent to you via email on dispatch so you can keep an eye on your delivery.