If your Aquaroll has a cap which measures 58mm in diameter your Aquaroll was manufactured before 1992.

Unfortunately, we don't manufacture caps for these Aquarolls anymore. All Aquarolls manufactured after this date feature an 80mm filer cap, which will fit onto the current 29 litre, 40-litre beige, 40-litre silver Aquarolls and all models of the Wastemaster.

If you need an 80mm cap for your Aquaroll you can purchase one here.