A. Material: Rubber B. Size: 40 Unit (Pack of 1) C. Style: Glue D. Sterility index: Sterile E. Shape of the Patch item F. About this item 1. Skin-friendly - It is soft to the touch and can help prevent skin irritation. It is comfortable to wear during the day or at night. 2. Waterproof - The bands are water resistant and suitable for sports, swimming, or use in the shower. They dry quickly after a shower and leave no streaks. 3. Hypoallergenic - Made of medical latex-free material, it is breathable and comfortable, leaving no residue on the skin. 4. No holes and no glue in the center - There is no glue at the sensor, providing protection and facilitating easier replacement when necessary. Outside diameter: 70 mm for proper attachment of your sensor. 5. Easy to use: It can be easily applied to the skin. With a pre - cut paper back, it can be used independently without extra help.