Plugs used on a Samsung S4 mini Black Edition

Ordered for my S4 mini Black Edition these transparent stoppers. Transparent therefore to spoil the silvery metal frame from the mobile phone not only colored plugs.
The plug is made of silicone and feel smooth on and soft.
The plug for the headphone jack can be easily inserted into the opening. As the head of the plug is slanted, you should align the plug previously before it completely pushing. In my S4 mini, the plug is not firmly locked, but also not too loose. After I had it completely pushing it sits flush with one side, almost within the headphone jack. On the other (front) side a small edge is visible. I had concerns that it sinks completely into the headphone jack. I did not try it and therefore do not push with force. The small protruding edge makes sense to pull the plug again. This is done using his fingernail. It scrapes the projecting edge so that it is pulled out of the socket. Is somewhat tricky.
The plug for the Micro-USB port is also located on my S4 not solid, but also not too loose. Care must be taken as rum to the plug intercalates. For me, the plug jammed only about 1 mm before it is applied to the frame of my cell phone. However, it does not fall off. What I do not like is the thick edge of the stopper. It protrudes by about 1 mm from the mobile frame. It looks a bit strange. Let's see how long do these plugs as this so often must be pulled out in order to charge the battery.
Let's see how the plug behave in the next few weeks in use.