31100—Without backrest
Adjustable height • Stain resistant black base with 5 legs • Silent casters • 2-year warranty • Ultra-white and ultra-resistant vinyl • Partial assembly required. Minimum height 20 1/2" • Maximum height 27 1/2"

31200—With backrest
Stool with adjustable height • Adjustable and ergonomic backrest  •
Stain resistant black base with 5 legs • Silent casters • 2-year warranty • Ultra-white and ultra-resistant vinyl • Partial assembly required • Minimum height 20 1/2" • Maximum height 27 1/2"

 31300—With backrest
Cushion-shaped to help improve blood circulation at  thigh level • Adjustable and ergonomic backrest • Stool with adjustable height • Stain resistant black base with 5 legs • Silent casters • 2-year warranty • Ultra-white and ultra-resistant vinyl • Partial assembly required • Minimum height 20 1/2" • Maximum height 27 1/2"