Customized Stress Relievers, Construction Cone - Stress Reliever - Polyurethane, Construction cone stress reliever, 2 1/2" x 2 1/2" x 3 1/2". Due to their handcrafted nature, stress ball sizes, colors and textures may vary. Factory cannot guarantee consistent imprints or PMS matches. Material: Polyurethane. ... #LCN-CC04 $1.58/each.