These squeezable backbone shaped stress ball. This stress ball experts. Made from pu material, measuring 2. 1*1. 5*3. 8 inches, this custom backbone stress ball. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. We offer logo printing and full packaging customization. Product Highlights: Portable, durable, practical for daily use. This Backbone Stress Ball is ideal for your promotional needs. Suitable for OEM and ODM support and corporate events. Available in bulk quantities for corporate buyers. Reliable lead times ensure timely delivery.