500 Self Seal QuickBooks Double Window Security Check Envelopes - FOR Business Laser Checks, ULTRA Security Tinted, Self adhesive Peel & Seal White, Size 3 5/8 x 8 11/16-24lb NOT FOR INVOICES Designed To Fit Computer business checks, QuickBooks checks Envelope is ideal for all business, professional and personal correspondence Peel & Seal Flap: No water required. Peel strip and fold flap, then press for a quick, secure seal Premium 24 LB - Color: White - Finish: Smooth/Wove Self Seal Double Window, Security tinted for added privacy and confidentiality