PRODUCT DESCRIPTIONTotal Page: 30 sheetsMaterial: Paper 120 gramsSize: A6 105 x 170 mmNon toxic, No smellMade in Korea There may be an error of about 5 paper refill sheets. When using inlay, the front and back sheets may cause paper wrinkles. There is a compatibility with other companies products depends on the size of the perforation and the gap between the perforations. You need to check the standards. For processing reasons, there may be press marks or cut marks on the side of the perforation. The spacing between perforated holes is based on the point where the perforated hole ends and starts. Compatible refills may also have a difference of 1-2 mm because the measurement values are different depending on the size of the perforation and standard for measuring the gap between them.