... jewelry store security, jewelry security tag,jewellery eas tag,hard tag, jewellery hard tag ,rf jewellery tag, gem tag, bijou security tag ... , gem anti-theft tag,am jewellery tag, eas rf jewellery tag,eas am jewellery tag,custom jewelry tags.Grillstone Electronics Technology ... of 8.2Mhz &58Khz, with grillstone rich experience on jewellery hard tag manufacture. Eas Custom Jewelry Products Mainly used ...