The 300 line Flute Pads are 2.7mm thick, double skin flute pads and are made in the USA with U.S. materials! These flute pads offer the technician a very affordable, yet quality pad! Please note this listing is for an assortment of (50) flute pads, with commonly used sizes. If you would like to choose the pad sizes, we will make the change at no extra charge. Just email us the sizes you would like after your purchase. Available sizes: 11.0mm, 11.5mm, 12.0mm, 16.0mm, 16.5mm, 17.0mm, 17.5mm, 18.0mm, 18.5mm, 19.0mm, 19.5mm, 20.0mm.