The 3M Red Dot Electrodes 100-pk Ref#2560 are high-quality, foam-based electrodes designed for use with ECG and EKG machines in a medical or lab setting. With the trusted brand of 3M and the model featuring red dot visibility, these electrodes provide reliable and accurate readings for healthcare, lab, and dental applications. The best buy date is 04/05/2024. The manufacturer gives a recommendation of the best buy date but also states a shelf life of up to 9 years.