Tile Round 1 x 1 with Black 'O' print

Reference

98138pr0240

BrickLink® #

98138pb225

Tile Round 1 x 1 with Black 'O' print (part 98138pr0240) is a LEGO element. CollectORbuild's catalog records it in 3 sets, including Bag Tags Mega Pack - Messaging and Creative Designer Box.