The replacement disks 2, 3, 4, 5 for Bowflex 552 Series 2 are essential for adjusting your weights for this dumbbell platform. Made of durable plastic and featuring a vibrant orange color or deep red, they are stronger than your original OEM disks. With a lifetime warranty, you can trust that these replacement disks will provide a secure and efficient weight training experience for years to come. Free shipping!