Hira-To - PSA (sticky back) - genuine replacement discs 80, 60, 30, 15 or 9 micron. Please state what micron size you would like. £2.25 Quantity: at £2.25 each Add To Basket 0 in your basket View Basket Checkout Price is per disc. These have the PSA or sticky back to them. Please state what micron size you would like, the choices are below: 80, 60, 30, 15 or 9 micron. It is important to change the discs when they become worn to prevent overheating the scissor when sharpening.