Must order 100 per color for assorted. 

Durable TPR and ABS construction for long-lasting use
Spiked surface stimulates muscles and promotes blood flow
Helps relieve tension, soreness, and muscle knots
Compact and portable for use at home, in the office, or on the go
Ideal for feet, back, shoulders, and other targeted areas
Size: 2-3/8" x 2-1/4" x 2-3/8"