Tag:
Model Number: Tag18/20/25/30/401/501
Key Specifications/Special Features:

Dia: 18mm, 20mm, 25m, 30mm, 40mm, 50mm
Material: PVC/ABS
Reading distance: 30-80mm(according to the dia of tag)
Based on GK4001 chip, with EM9917 reader
Operating temperature: -40 to 70 degree Celsius
Storage temperature: -40 to 80 degree Celsius

Chip available:
GK4001 (125KHz, 64 bits, R/O): Yes
H4102 (125KHz, 64 bits, R/O): Yes
Temic E5557 (125KHz, 330 bits, R/W)
Hitag 1 (125KHz, 2048 bits, R/W)
Mifare1S50 (13.56M, 1024bits, R/W)
Mifare1S70 (13.56M, 4K bits, R/W)
I-code sli (13.56M 1024 bits, R/W)
TI (13.56M, 2K, R/W)