Tubeworx brass cones are made to fit the rest of the system perfectly and are ready to use straight out of the packet - no need to get the file out to make them fit.They have been designed to have both plenty of weight, but also to have a good recess.All the cones fit perfectly onto our inner tubes so there's no need to swap liners or tubes to find the correct one for the cone you are using.We offer three different sizes in a good range of colours, so you should be able to find something to suit your needs. 20 cones per pack.