Classic Crest Avon Brilliant White #10 Envelope 500 in box 24 # Writing Smooth Finish Has Neenah Classic Crest watermark FREE SHIPPING! No. 10 Envelope – Business Flap (4.125-in-x-9.5-in) Basis 24lb writing (watermarked) Smooth finish, superior quality….Neenah’s Classic Crest. Classic Crest papers have the outstanding formation, smoothness and brightness to deliver quality results. Made with renewable energy and boasting acid free, elemental chlorine free FSC and Green-e certified, this provides a responsible option with the highest level of quality.