http://www.boomerangtags.com/store/list.php?A=S&ID=16 These easily go on mushing collars. Much easier than the riveted ones. Last time I bought them, if you got 10 or more with the same text the price dropped to $3.50 each plus shipping. You have to call and ask for the quantity discount. They can send flat ones, too--good for ID on sleds. Tom