Stainless Steel Finned Strip Heaters – 1-1/2″W element 5/16″W x 1/2″L slotted holes 10-32 screw terminals 1-3/8″H x 2″W across finsSeamless 304 stainless steel tube provides the best combination of physical strength and resistance to high temps. and chemical corrosion. Sheath temp.: 1200掳F max. Fins are nickel-plated steel.UL Recognized.