Pre-Roll Filters OCB Premium Perforated filter tips are made from organic ingredients and unbleached paper, making them environmental-friendly. OCB filter tips are perforated which means they are lined with markings which makes it easy to roll the perfect filter. Each display box has 25 packs of filters and each booklet contains 50 Filter cards. OCB Virgin Filter Features: All-Natural Unbleached Genuine Quality 50 Cards per Booklet Dimension: 60mm X 18mm