32 hand-stitched panels guarantee a good level of sphericity.
TECHNICAL INFORMATIONS
Weight
410 - 450 g
Circumference
680 - 700 mm
Sphericity
Average measured variation: Maximum of 1.8%.
Maximum pressure loss
20% in 72 hours
Bounce
Between 125 and 155 cm with a maximum difference of 10 cm between the ball's highest and lowest bounce. Each ball is dropped 10 times on a steel plate from a height of 2 metres