Spring Ring S:
Solid silicone + 1pc plastic spring,
Inner diameter: 23mm
Outer diameter: 33mm
Thickness: 5*9mm
Length: 50mm
About 11g
Spring Ring L:
Solid silicone + 1pc plastic spring,
Inner diameter: 23mm
Outer diameter: 33mm
Thickness: 5*12mm
Length: 56mm
About 15g