The tag and clip are both made of metal. This increased durability comes in handy, as collar pieces can snag on brush, corners, etc. 
 
See matching PAWS PARANORMAL BLACK K9 PRODUCTS:
 
Paws BLACK K9 Paranormal Backpack
Paws BLACK K9 Pet TAG
Paws BLACK K9 Dog Tank Top 
Paws BLACK K9  Identifier Scarf
 
.: Print on both sides
.: Material: white coated solid metal
.: Size: 1" round
.: Metal clip included