Product typegrade of productsub gradenon metallurgical (hollow) rollsccisg ironsg non-metallurgical rolls:in general the non metallurgical rolls are used in the clear chilled grade owing to the hardness and the chill depth reuired for relieving of the thermal stresses. However, jemco has developed a new product for the cracker mills, ink manufacturing, resin rolling etc, in the form of sg grade hollow rolls.