Enhance your marking precision with the Irwin Strait-Line Chalk Refill in vibrant red. This 227g (8oz) chalk is specifically designed for chalk line reels, making it perfect for outdoor use. With a lasting formula that remains visible for up to 2 months, this chalk is ideal for various projects, ensuring your lines stay sharp and clear. Whether you're a professional contractor or a DIY enthusiast, this chalk refill is a must-have for accurate measurements and professional results. Upgrade your toolkit today with this reliable chalk refill!