Oil eye (new part) made of aluminum with seal

The oil sight allows you to easily check the gear oil level on the motorcycle. Previously you had to open the filler plug to check the oil level, now you just need to look at the oil sight. The advantage: since you have to fill in a little more transmission oil with the BMW than up to the lower edge of the filler opening, when you check the oil level without an oil eye, oil always leaks if the level is correct and you do not tip the motorcycle. This problem is solved by using the oil eye.
Wrench size for the oil eye is 22 mm.