Firepower 1441-0049 Shade 10 Glass Filter Plates, 5-1/4-Inch x 4-1/2-Inch Filler plate, shade #10 Size: 4.5 x 5.25 Hardened glass is heat-treated for strength Meets or exceeds: ANSI z87-1, all current applicable Federal specs., CSA Z94.3, CE and various international standards