step up and down ring

1)This Set of Stepping Adapter Rings allows you to mount a different thread size filters and accessories on your camera's with different thread size. You can combinethem and use your old filters with different thread size on your camera withdifferent thread size using them.It can be installed very easy, simply screw it on the lens of your camera with respective thread size and you are ready to screw another thread size filters andaccessories on the Stepping Ring. You can use them in combination. We have the following size :( unit mm) Adapter diameter(mm)Camera diameter(mm) 25 -------- 27 28 30 30.5 34 37 40.5 43 46 49 52 55 58 62 67 72 77 82 27 -------- 25 28 30 30.5 34 37 40.5 43 46 49 52 55 58 62 67 72 77 82 28 -------- 25 27 30 30.5 34 37 40.5 43 46 49 52 55 58 62 67 72 77 82 30 -------- 25 27 28 30.5 34 37 40.5 43 46 49 52 55 58 62 67 72 77 82 30.5 -------- 25 27 28 30 34 37 40.5 43 46 49 52 55 58 62 67 72 77 82 34 -------- 25 27 28 30 30.5 37 40.5 43 46 49 52 55 58 62 67 72 77 82 37 -------- 25 27 28 30 30.5 34 40.5 43 46 49 52 55 58 62 67 72 77 82 40.5 -------- 25 27 28 30 30.5 34 37 43 46 49 52 55 58 62 67 72 77 82 43 -------- 25 27 28 30 30.5 34 37 40.5 46 49 52 55 58 62 67 72 77 82 46 -------- 25 27 28 30 30.5 34 37 40.5 43 49 52 55 58 62 67 72 77 82 49 -------- 25 27 28 30 30.5 34 37 40.5 43 46 52 55 58 62 67 72 77 82 52 -------- 25 27 28 30 30.5 34 37 40.5 43 46 49 55 58 62 67 72 77 82 55 -------- 25 27 28 30 30.5 34 37 40.5 43 46 49 52 58 62 67 72 77 82 58 -------- 25 27 28 30 30.5 34 37 40.5 43 46 49 52 55 62 67 72 77 82 62 -------- 25 27 28 30 30.5 34 37 40.5 43 46 49 52 55 58 67 72 77 82 67 -------- 25 27 28 30 30.5 34 37 40.5 43 46 49 52 55 58 62 72 77 82 72 -------- 25 27 28 30 30.5 34 37 40.5 43 46 49 52 55 58 62 67 77 82 77 -------- 25 27 28 30 30.5 34 37 40.5 43 46 49 52 55 58 62 67 72 82 2)Material:aluminium 3)Color:silver/black 4)1pcs/high qualified pp bag 5)Packing:800pcs/ctn