K&F CONCEPT 11 Pieces Metal Step Down Filter Adapter Rings Set Step Down Rings sold2024 and protective hard case 26 Thread length 11mm and protective hard case iPad Air 4th 5th 6th please contact us for better help Package Included: 82mm 77mm Step down ring x 1 77mm 72mm Step down ring x 1 72mm 67mm Step down ring x 1 67mm 62mm Step down ring x 1 62mm 58mm Step down ring x 1 58mm 55mm Step down ring x 1 55mm 52mm Step down ring x 1 52mm 43mm Step down ring x 1 43mm 37mm Step down ring x 1 37mm 30mm Step down ring x 1 30mm 26mm Step down ring x 1 How does it works: For example: 62 58mm 62mm Back Threading(your lens size) 58mm Front Threading(your other accessories size) It allows you to convert your 62mm lens' thread to a wider range of accessories that fall under the 58mm thread range K&F Concept Committed to providing different filter adapter rings for muti choice