Pure PTFE External BushesExternal Pure PTFE Bushes are made from 100% pure PTFE.To fit these bushes, the pole tip section should be cut back carefully, removing any sharp edges until a tight push fit is obtained.The Range: No1 (diameter: 1.2mm internal, 1.8mm external) No2 (diameter: 1.4mm internal, 2.0mm external) No3 (diameter: 1.7mm internal, 2.3mm external) No4 (diameter: 2.0mm internal, 2.7mm external) No5 (diameter: 2.3mm internal, 3.0mm external)Features: Two PTFE bushes per pack