Adaptable to a wide variety of industrial heating applications. May be clamped against a surface, immersed in liquid or used to heat air in ovens or ducts. Can be formed to any desired shape for heating by radiation, conduction or by convection. A coiled nickel-chromium resistance wire is embedded in refractory material enclosed (incased) in a seamless sheath of brass, steel, stainless steel, or titanium. Minimum Charge: because of the set-up required to produce these units a minimum order charge of $20.00 applies.