Replacement 18 Inch Electric Poly Spinner Disk Assembly for SaltDogg® Spreaders Experience seamless and efficient spreading with our Replacement 18 Inch Electric Poly Spinner Disk Assembly for SaltDogg® Spreaders. Made with durable materials, this spinner disk is designed to disperse salt, sand, or ice melt evenly and effectively. Increase your productivity and save time with this high-performing replacement part.