【Specifications】Color: Black; Materials: Plastic, Cement, Metal; Weight Plate Size (Dia. × Thickness): 5.5 lb: 8.3″ × 1.5″, 4.4 lb: 7.7″ × 1.5″, 3.3 lb: 7″ × 1.3″; Handle Length: 5.5″; Set Includes: 2 × Dumbbell Bar, 4 × 5.5 lb Weight Plate, 4 × 4.4 lb Weight Plate, 4 × 3.3 lb Weight Plate. 【Durable Materials】This 55 lb dumbbell set is made of cement weight plates covered with durable plastic and electroplated metal dumbbell bars. The solid materials are ready for years of use. 【Adjustable Weight】Customize it to your ideal exercise intensity! This pair of dumbbells have 12 weight plates in 3 different weights (5.5 lb, 4.4 lb, 3.3 lb), 4 pieces for each weight, and 4 spinlock collars to make the adjustment easier.