Greenwestons Bed Risers, 4-Pack Furniture Risers, Heavy Duty Bed Lifts in Heights of 3, 5 or 8 Inches, Lifts up to 1300 lb, Stackable Risers for Sofa, Table Legs Extenders, Black Color: Black Material: PP (Polypropylene) Plastic Size of 3.2” High Risers: 4.8”L x 4.8”W x 3.9” H (12 x 12 x 9.8 cm) Size of 4.8” High Risers: 6.3” L x 6.3”W x 5.9” H (15.9 x 15.9 x 14.9 cm) Weight of Each 3.2" High Riser: 0.33 lb (150 g) Weight of Each 4.8" High Riser: 0.55 lb (250 g) Max. Static Load Capacity: 1300 lb (590 kg)