The DiversiTech Packard 120 V Silicon Nitride Hot Surface Igniter Kit is a universal replacement ignition component engineered for gas-fired heating equipment such as furnaces, boilers, and water heaters. Built around a high-quality silicon nitride ceramic element, this igniter is designed to withstand high temperatures and deliver reliable, long-lasting performance in demanding environments compared with older silicon carbide designs, it offers enhanced durability, faster warm-up and greater resistance to thermal shock.