Silicone O Ring Sealing Gasket
Material: Food Grade Silicone
Temperature Resistance: -35Deg.C~ + 200Deg.C
Cross Section 1/2/3/4/5mm 
ID 3mm-140mm
Color: White
Hardness: 55
Feature:
1.Good sealing and deformation resistance.
2.Wear -resistant,waterproof, insulation.
Thesize is outer diameter * wire diameter, inner diameter= outer diameter-2x wire diameter.
2.Please allow a little size error due to manual measurement.
3.The product itself allows tolerance.