Western Sulphite® Commercial Plasticleer® Window - This line of white wove commercial window envelopes is manufactured with diagonal seams, cellophane window and a traditional remoistening seal.Western Sulphite SFI Plasticleer Window (1 1/8 x 4 3/4, 3/4L - 1/2B)White Sulphite (SFI CERTIFIED) 92% Brightness Vellum Finish Diagonal Seams Cellophane Window Remoistening Seal Flap Down