The Block Packing (10x) ST1218 from Bradford White is a crucial component for ensuring optimal sealing in water heater installations. This high-quality packing material is designed to withstand high temperatures and pressures, making it ideal for use in gas and electric water heaters. Each block is precision-engineered for a perfect fit, ensuring reliable performance and preventing leaks. This pack of ten provides ample supply for multiple installations or repairs, making it a cost-effective choice for service professionals. Trust in Bradford White's commitment to quality with this essential maintenance item.