Amazon.com: Step Up Lens Filter Adapter Rings - Set of 9 - Allows You to Fit Larger Size Lens Filters on a Lens with a Smaller Diameter - Sizes: 37-49, 49-52, 52-55, 55-58, 58-62, 62-67, 67-72, 72-77, 77-82 mm : Electronics
1/2″-3/8″ or 1/2" - 1/4" Click Fit FlexiTank Adapter and Filter - AutoPot Watering Systems USA