Material Rubber Size 40 Unit (Pack of 1) Style Glue Sterility index Sterile Shape of the Patch item About this item Skin-friendly - Soft to the touch and prevents skin irritation. Comfortable to wear day or night. Waterproof -- Our bands are water resistant and perfect for sports, swimming or in the shower. Dries quickly after shower and leaves no streaks. Hypoallergenic - Medical latex-free material, breathable and comfortable, leaves no residue on the skin. No holes and no glue in the center -- No glue at the sensor, for complete protection and easier change when needed. Outside diameter : 70 mm For perfect attachment of your sensor Easy to use: easy to apply to the skin. Pre-cut paper back, easy to use by yourself, no extra help needed. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!