... 28mm, 30mm, 38mm, 42mm Bottle cap/Plastic cap/Injection capPlastic cap Our plastic cap with an inner drop plastic seal, theft ring, leakage, seepage, ... printing security and so on.We using compaction machine for produced cap, very beautiful surface without injection sprue or ... , 30mm, 38mm, 42mmSurface printing: Pad printing machine without heat.We could print one color or multi-color logo Plastic cap