The only advantage of this CAP - low price. Besides, the quality is very bad. CAP is too short, too shallow. Cap is too loose, a bit too large diameter. It falls off the M12 connector very easily. The ring is a bit too loose too. Diameter too large. It does not provide good protection for the M12 socket against dust or moisture. The rubber is very soft, flexible.
Good quality.The seller packed the package very well.thank you