Hylam sheet 4feet longX 4feet wide X 25mm thick as per ISI, industrial grade, Hylam of 200 dia & 1 m length as per ISI, Hylam Sheet 4 mm thickness x 1. 2 m x 1. 2, m as per ISI industrial grade, Hylam Sheet 5 mm thickness, x 1. 2 m x 1. 2 m as per ISI industrial grade