PATIKIL Welding Len Shade 13 Glass 4-1/4 Inch x 2 Inch 4pcs Hardened Glass Black Darkening Filter Plates Covers Replacement for Weld Helmet Hood

Shade: 13 GLASS; Thickness: 3mm/ 0.12 inch; Overall Size: 108 x 50mm / 4-1/4 x 2 inch (L*W)

Features: The lower numbers are lighter shades for less intensive welding applications, and higher numbers indicate darker shades for more intense welding processes.

Advantage: The shade level of a welding lens refers to its ability to filter out specific amounts of light; The higher the shade number, the darker the lens and the more protection it provides; The shade is 13.

Instruction: Align the lens properly in the lens housing or frame of the welding helmet; It should fit securely without any gaps or misalignment; Once the lens is installed, put on the welding helmet and adjust the fit to ensure it sits comfortably on your head.

Notice: Please confirm that it is suitable for replacing a 4-1/4" x 2" helmet lens.