EXTRA SLIM 5.7mm / 120 pcs in pack. 1200 filters of 5.7mm diameter, UNBLEACHED & BIODEGRADABLE Here are the latest Ultra Slim OCB filters, organic hemp filters. Pack has 20 sticks of 6 pre-cut filters tips wrapped in a protective film. Organic filters are 100% natural, unbleached. The filters are biodegradable and decompose naturally, after use, in 28 days.