Speed Stacks Stack Pack - 12 BLACK Competition Cups with DVD, Precision Timer and Mat
12 Speed Stacks Competition Cups Specially desighed for performance * STACKit Precision timer holds and protects cups when not in use. * STACKFAST Instructional DVD to teach you how to stack fast including tips. * STACKit Mat - Provides cushioning and just the right surface friction and stability. * Speed Stacks are the Official Product of the WSSA - World Sport Stacking Association.