Fibre-Metal by Honeywell Welding Magnifier, High Performance, Series: 3651, For Use With: Welding Helmets, 1.25 Diopter, Polycarbonate, Clear, 2 x 4-1/4 in.Fibre-Metal provides a full selection of welding filters, safety and cover plates and lenses for our welding helmets and goggles. Our HIGH PERFORMANCE line includes a top quality plate or lens for virtually every metal fabricating application. All products are produced to the highest standards with rigid quality control to enhance a fabricators view of the job for maximum productivity while providing protection in accordance with ANSIZ87.1requirements. To get the most from a Fibre-Metal welding helmet or goggle, equip it with HIGH PERFORMANCE filter, safety and cover plates or lenses.