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 prime business checks prime business checks 500 self seal double window security tinted envelopes – designed for business checks, quickbooks, laser checks – security tinted – self adhesive peel and seal – white – size 3 5/8" x 8 11/16" (checks will not move) – 24 lb – 500 per box, 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. 92663 envelope