Material: Polyethylene lid has a screw-type seal that emphasizes on the sealing properties, so it has an inner plug. Square shape allows storage without any gaps. Graduated spacing: 0.3 fl oz (10 ml), Lid inner diameter: 0.7 inches (17 mm), Capacity: 1.8 fl oz (50 ml), Size: 1.3 x 1.3 x 3.5 inches (32 x 32 x 90 mm), Quantity: 10 pieces.