The Stamina Versa-Bell II Dumbbell Additional information: Durable steel constructionWeight minder to display chosen weight amount25-pound dimensions: 14L x 6W x 5.5H.Some assembly required About Stamina Products, Inc. Founded in 1987, Stamina is dedicated to building a stronger, healthier you. The company supplies high-quality products at excellent value to the fitness and leisure markets, showcasing hundreds of products around the world over the past two decades. Stamina is responsible for such brands as Body by Jake, Suzanne Somers, Tony Little, and more. Their mission is straightforward and admirable: Stamina strives to outperform the competition by maintaining effective communication, consistent quality, and superior service. They will continue to pursue perfection through the design excellence of these home fitness products. 9 dumbbells in 1 compact unit. Change weight via easy-to-use dial. 2.5-pound weight increments. Easy-grip, non-slip handle. Manufacturer"s warranty included (see product guarantee).