Specifically designed for EMS and TENS applications, UltraStim Snap electrodes provide a smooth and even current distribution with the use of proprietary silver grid patterns that precisely control the electrical current. The surrounding border creates a deliberate current roll-off to prevent any edge stinging. Both MultiStick and the Ultra Gentle DermaFlow hydrogel options provide optimal comfort during use. The bottom snap is precisely matched with the system's impedance to ensure consistent current flow across the electrode surface. The CC are compatible with additional units. Each rectangle electrode measures 2" by 4" (5 cm x 10 cm) and feature a single snap. There are 4 electrodes per pack with 10 packs per case (40 electrodes total).