eep the liquid away ?from ?the inside part of the applicatior. Prevention of leakage of liquid.And for the Out cap,it has 2 parts.one is the tooth cap,it connected to the tube,make ?the plug and the applicator fixed.One is the top cap,to protect the applicator and keep it clean.The out cap is made of ABS.It in produce plastic articles by injection moulding,can be in transparent ,injection color,or electroplating color. ? ??Contact Information:Company InformationFactory ShowCertificateExhib