Baseball/Softball Helmet Personalized ID Number Kit (2 Sets of Vinyl #'s 0-9) Baseball/Softball Helmet Identification Number Kit. 2 sets of 0-9 self-adhesive 3/4" vinyl numbers to personalize a helmet. Adhesive backed indentification labels also included. Used by Players and Teams from Youth Little League and Travel Ball to High School and College Can also be used on Football, Lacrosse & Hockey Helmets