Set of 6 Heavy Duty 18mm x 14mm Variator Pulleys These high quality HD polymer [Heavy Duty] variator pulleys not only provide excellent durability as a replacement for worn out original rollers, but also offer upgrades to allow the variator to operate at full capacity. The inner race is knurled during production to ensure that the HD polymer outer race remains in place even under the most demanding conditions. The high proportion of PTFE (polytetrafluoroethylene) in the outer shell ensures good self-lubrication and therefore a long service life. The sliding properties of PTFE also ensure easy movement during operation. Excellent quality and value for money, and one of the most durable variator pulleys on the market. Available in weights from 8g to 14g, you should research which weight is best for your needs, as simply choosing the lightest weight is not always the best option.