Wesco® Security Tint Commercial Accounting Windows These security tinted window envelopes are designed specifically for use with accounting software packages like QuickBooks for standard and voucher checks.Wesco Tint SFI Double WindowTW 7/8 x 3 1/2, 3/8L - 2 3/8BBW 15/16 x 3 1/2, 7/8L - 11/16BWhite Sulphite (SFI CERTIFIED) 92% Brightness Vellum Finish Blue Wesco Inside Tint Diagonal Seams Double Poly Window Remoistening Seal Flap Down