K&F 18 Pieces Filter Ring Adapter Set, Camera Lens Filter Metal Stepping Rings Kit (Includes 9pcs Step Up Ring Set + 9pcs Step Down Ring Set)Include Step Up Filter Adapter Ring Kit(37 49, 49 52, 52 55, 55 58, 58 62, 62 67,67 72, 72 77, 77 82mm) * Include Step Down Filter Adapter Ring Kit(49 37, 52 49, 58 55, 55 52, 62 58, 67 62,72 67, 77 72, 82 77mm ) * Great tightness,no wobbling or cross threading. Ultra low chemical residues, attached to a solid! * Converts the thread size of your lens to the thread size of any other accessory (such as filters, hoods, flashes and lens converters). *