1.Material:polyurethane 2.Diameter:4cm,5cm,6.3cm,7cm,9cm 3.Color: any color available 4.Logo imprint available 5.OEM welcome When you feel stressful,squeeze it,unhappy,throw it.safe & save money. ================================ High quality and reasonable priceNon-toxic,no harmful,soft and saveEco-friendly materialSolid with hand feel,squeezableWe also have other shape stress balls such as earth ...