Slightly thicker ribs to cushion big drops and last longer. Thick midsized flange can easily cut off following groove. V.2 has been lengthened to 163mm. Extra soft and tacky rubber. Mid flange design with groove to remove. Matching Bar Plugs included. ###section### Product Specs DIAMETER: 31mm LENGTH: 163mm PACK SIZE: 2 (Pair) Colour: Green, Blue, Tiffany Blue, Bourbon, Black, Rich Mahogony