Premium Material: Crafted from FKM 90 shore material, these O-rings offer excellent resistance to high temperatures, fuels, and acids, making them perfect for underwater applications. Diverse Size Selection: This kit includes 12 different sizes of O-rings, ensuring you have the right fit for nearly any scuba diving need, from hoses to gear connections. Versatile Applications: Designed for use with dive hoses, diving equipment, and scuba tanks, these O-rings are essential for maintaining the integrity of your gear. FKM is the recommended material for diving with Nitrox mixtures. Convenient Storage: Each O-ring is neatly organized in a transparent plastic case with separated compartments, making it easy to carry, select, and store your O-rings for quick access when you need them.