Bingo balls are usually made of 38mm ping pong balls made in China.
The bingo balls being produced in our company in Shanghai,China can be divided into two categories: the 1st one is the outside-printing like these 2;4;6;8;10 and 12 sides and the 2nd one the inside-printing that boasts two types.
They have a good assortment, suitable for different entertainment needs on the globe.