... a better seal and solid solid silicon rubber products silicone ladder multilayer plugs has a better seal and solid solidThe conical ... (for example:clear,white,red,blue,pink,black and so on)and material are optional10.Silicone,Viton,Neoprene,Hypalon,plasticproductsPC,nylon ... :from shore A 8 to 95 silicon rubber products silicone ladder multilayer plugs