Certificate: EN71, ASTM F963, Phthalate Free for stress ball. 10 years experience for stress ball. 250 workers for stress ball Stress Ball Features:1) Material: PU Foam, non - toxic stress ball.2) Thousands of different stress ball for you to choose. 3) OEM ODM custom design stress ball are welcome.4) Logo brand printing on stress ball is available.5) Transfer printing for multi-color logo, pad ...