Irwin Strait-line Irwin T64901 Blue Chalk Refill 227gThis is a blue chalk refill designed for use with Irwin Strait-line chalk reels. It is suitable for both indoor and outdoor applications, providing a clear line for up to one week.Features Blue chalk refill Suitable for indoor and outdoor use Line visibility up to one weekSpecifications Brand: Irwin Strait-line MPN: T64901 EAN: 0024721500076 Weight: 227 g