This is a set of 36 table tennis balls offering high durability and performance. - Brand: TSP - Model: TSP730 - Color: Orange - Quantity: 36 - Type: Table Tennis Balls Size: 38mm There are stains and discoloration due to aging. The diameter of the balls differs from current models. These were found from when I used to play table tennis a long time ago. They were for official use back then. Although there are age-related stains, I don't think there are any dents or cracks. I think these are now rare items.