6 Metal Ball Petanque Set Heavy Duty Nylon Case. Color of case may vary in blue tone from images. Wood target ball, simple measuring device, heavy duty 600D nylon case, 6 chrome plated metal balls. 3 balls with 3 groove pattern and 3 balls with 4 grooves pattern. Steel balls are 72mm dia x 720gm. This is the average of weights and sizes for the much more expensive pro competion balls.