ITEM NAME:clear acrylic crystal position marker for pool table snooker balls referee ba Gw Description Features: Just place the marker behind the ball whilst in play and clean away any dust or dirt With its help, the white cue ball can be placed back exactly where it was after being chalked Diameter: Approx. 25.7mm Suit for Pool Billiards Material: Acrylic Color:Transparent Packageg Includes: 1 x Marker.Suit for Pool Billiards. Just place the marker behind the ball whilst in play and clean away any dust or dirt. 1 x Marker. Material: Acrylic. With its help, the white cue ball can be placed back exactly where it was after being chalked.