Inflatable lid seals have a limited lifespan. Just like the innertube on a bicycle, over time it will wear and eventually go out altogether. Be prepared with a spare.
Our sizing conforms to the variable capacity Minox tanks we offer. If you are looking to purchase seals for a different manufacturer's tanks, the sizes may differ. To find out which one you need just measure the inside diameter of the tank (not the lid). Select the closest size within 1 cm, if possible. Going a bit smaller is better than going larger. For example, if the inside diameter of your tank is 36 inches, convert that to centimeters. That's 91.44 cm. Go down to the nearest size we offer, which is 91 cm. That corresponds to our 800 liter size.
