-Uses powerful neodymium magnets with a vertical load capacity of 3.5 kg -The grooves on the inside prevent the mask from slipping when you put it on and take it off, so you can always put it on and take it off snugly. -Size (approx.): Diameter 17 x Height 35 mm -Material: Magnet: Neodymium, Body & Carabiner: Aluminum -Convenient for quickly attaching and detaching nets, small tools, etc. with one touch -Comes with a carabiner for easy attachment -Laser engraved logo on the side -Weight (approx.): 38g