Features: Measure the weight of the object before using the buoyancy ball, so as not to lose items.If you need a bigger buoyancy, you can use multiple buoyancy balls together. Premium Material: Our Buoyancy ball is made of high-quality cork, stainless steel and durable rope, with a smooth surface, light weight, waterproof, strong and convenient for carrying. The rope is not easy to fall off and can be used for a long for time.It's a nice accessory for all your aquatic adventures. Applicable Occasions: for Ideal for anyone who like water sport or travel near water, great for all kinds of water sport like kayaking, sailing, water-skiing, boating, swimming, fishing, surfing and so on. Multi-purpose: Floating ball keychain makes your keys easily identifiable, and keeps your keys float in water, It can be used as a buoyancy ball can also be used as a decoration. Specifications: Material: Cork Size:Small/Large Small Size:Approx.53mm/2.08inch Large Size:Approx.35mm/1.37inch Note: Please allow 1-2cm errors due to manual measurement,pls make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Rope Color Random. Package includes: 2 Pieces Keyring