Polycarbonate Protection Plate, Compatible with Brand Speedglas, Compatible with Grainger Part Number 21VG03, 31DA01, 38VT95, 38VT96, 38VT97, 48WL47, 6DNC6, 6DNC7, 8VT46, 9A842, 9NUA2, Compatible with Manufacturer Model Number 9100, 9100 QR, 9100-Air, Compatible with Series 9100 Series, Features Inside Protection Plate, Replacement Part, For Use With 9100 Series Welding Helmets, Material Polycarbonate, Plate Length 4 5/8 in, Plate Thickness 0.063 in, Plate Width 2 1/2 in, Standards ANSI Z87.1