This is the second and third blanking end caps I have bought to plug the end of a commando plug on an external electrical appliance. The first one I ordered was too small but it showed me what size I relly needed. The second and third ones arrived but still wont fit. The problem is the flexible parts which are meant to allow the plug to push slip in are too solid and wont flex at all. I will try to ALTER these plugs to achieve an O-ring push fit.