Double-pocket chart ring set: You will get 20 double-pocket chart rings, which are specially designed to replace card packs in classrooms and offices It is a good teaching aid accessory for school teachersMultifunctional design: The double-ring design of the picture ring structure is stable, which can safely fix your picture, which brings convenience to your teaching processHigh-quality material: This double-chart ring is made of stainless steel, which is reliable and durable; unlike plastic rings that are easy to break, these sturdy and durable metal rings can be closely attached to different charts, making them a multi-functional chart ring around themEasy to use and reusable: these pocket chart rings no longer require hardware, just put on top of the chart to complete; they can be applied again and againLoad-bearing: This metal chart ring can fit any chart width, you can use these rings to support multiple charts at oncecolour: silverMaterial: steelPackage Contents:20 x hook upOnly the above package content, other products are not included Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing The measurement allowed error is +/- 1-3cm