Middy PTFE Bush + Connector
These 'MTDI' bush and connector sets from Middy offer excellent value for money. While some other bushes are sold quite cheaply, they are usually made from nylon which will wear and damage your elastic. These, however, are made from 100% PTFE material and you get one colour-matching bush and connector per packet. Available in various grades/colours - 4-10 Orange (2.85mm), 10-14 Yellow (3.55mm), 14-18 Red (3.85mm) and 18-24 Blue (5.2mm).