Nylon cap, Color:white ,blue,green Size:18",19",20",21",24" Certification:ISO9001 100pc/polybag,1000pcs/ctn Nylon Cap: Balck & WhiteFeatures: 1. Capability: disposable, soft2. Cap is compactly folded in strip easily open to shape.3. High air permeability.4. Suited to electronic manufactures,restaurants,food processing,school,hospital,etc. public environments.