New Product KO Thread KO Thread Light Gray £2.50 Quantity: at £2.50 each Add To Basket 4 in stock. 0 in your basket View Basket Checkout K.O. features a circular cross section making it easier to thread than other similar threads. K.O. is pre waxed, supple, abrasion-resistant, colourfast, tangle-resistant and knots tightly. Similar in thickness to Nymo B Will fit through a size 12 needle 0.15mm diameter. 50 metres per spool.