Usage: Place the coin in the center of the hole. Secure the paper clip using flat-ended nails or attach the four corners with double-sided tape. Set of 50, 2 grids per sheet, each with a diameter of 40mm. Suitable for coins with larger diameters. Made of white card paper and paper clips. The inner film material is OPP, which is safe for coins, highly transparent, and features precise craftsmanship, making it ideal for coin collection. This product is made from pure wood pulp paper, offering good hardness, smooth coating, high transparency, accurate ring alignment, and cleanly cut edges without jaggedness. Please select the appropriate model based on your collection needs. Color: White Material: Paper + OPP Size: 100 x 50 x 0.58 mm Package Contents: 50 x Coin paper clips Only the items listed above are included; other items are not part of the package. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error is +/- 1-3 cm.