On Metal NFC Tags NTAG213:Quick DetailsMaterial: PVCDesign: CircleSize: 13mm, 20mm, 25mm, 30mm. 35mm. 40mmChip: Ntag213Frequency: 13.56MHZPersonalization: Logo/ Number Printing or EncodingReading distance: 3-5cmPrototcol: ISO14443A Diameter:13/ 15/ 20/ 25/ 30/ 35/ 40mm... Thickness:0.84mm/1mm/ 1.2mm/ 1.5mm Chips Available:HF---1K F08,1K S50, Ntag213, Ntag215, Ntag216, Topaz512, Desfire 2K/ 4K/ 8K, I Code Sli... Clear Small NFC Tag 13mmAnti-Metal NFC TAGS 15*20mmOn Metal Hard NFC TAGS 30mm