Set of 6 HD Variator Rollers. Outside Diameter: 16mm Depth: 13mm Weight: 3.0 grams (per roller) HD Variator Rollers are some of the best on the market and are ideal for replacing worn rollers or for tuning. The inner ring is knurled during production to ensure that the HD polymer outer ring stays 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. Very good value for money and one of the most durable variator rollers on the market. You should research which weight is best for your needs as simply choosing the lightest or heaviest weight is not always the best option. We have many different roller weight sets available which have different performance results. Set of 6 Rollers Supplied in the weights listed.