This type of nipple is the last we offered the type of Ball nipple . In contrast to other Ball nipples is not threaded, but a groove through which the oiler settles press-fit. With this application should nipple very well sit on the ground, but is complicated exchange of such oiler . The grease gun is connected to mazničce straight axis heads, we can say that this nipple is similar mazničce ball straight thread. Also, this the oiler to be produced according to DIN 71412 .