RENDS Vorze A10 Cyclone Crystal InsertThe A10 Cyclone SAs exclusive inner sleeves are all made out of high quality material that feels just like real skin. This Crystal texture has unlimited ribs and gives ultimate stimulation. Only compatible with the Vorse A10 Cyclone SA but its easy to insert and remove for cleaning, just remove the inner case from the main unit and firmly set it with the 6 pins. Insert the inner case into the main unit, make sure that it is firmly set, add the top cap