- Made by good quality and widely used rigid (hard) PVC
- Good insulation characteristic and good fire-resistant feature
- Protect wire and cable from easy damage or ruin
- No smell and never suffer from biotic attack
- Good resistance to weathering and impact
- Excellent resistance to water and aqueous solution
- It does not fade(discolor) after long time used
- Made by brass knurled nut which ensure high torque of screw
- Ensuring the safe use
