plastic cap describe: 1.Specification: 28/ 410 2.size: 31* 29( H) mm 3.material: PP 4. color: any one is ok advantage: 1.high quality, the competitive price 2.Sampls can be provide free 3.many years of producing experience 4.Usage: chemical, health, medical, food and household 5.surface processing: UV, Hot stamping, frosting 6.Logo engraved 7.Packaging: carton package