Drawing FI 04970 Size of Demister pad 640 mm diameter x 100 mm thick pad (150 mm over support grids). Made up in two sections. Materials of Construction: Knitted Mesh : 0.28 mm thick 304 stainless steel. Support Grids : Flat bar 25 mm x 3 mm thick and round bar 6 mm diameter 304 stainless steel.