Adhesive pad for Twin Beat 3 Turbo and Twin Beat 2 micro current mode. Axle Guards are tacky, flexible, and durable pads. The S size (1.2 inch (3 cm) round shape is used for facial skin care with the Twin Beat 3 turbo. Please note that the S size cannot be used for EMS muscle training mode. Store in the fridge for long term storage. 1 Set:5 bags,4 pads per bag If there is sweat or oil on your skin, the adhesive strength will weaken. In such cases, please use it after wiping your skin with a wet towel.