The OX-P025704 OX Pro Chalk Refill White 226g is a professional-quality chalk powder ideal for clear and sharp line marking. The fine particle formula ensures precise and long-lasting marks, while the bright white colour is perfect for use on darker surfaces where maximum contrast is needed. Supplied in a handy 226g easy-fill bottle, it allows quick and mess-free refills for OX Trade and Pro chalk line reels.