Blue Summit #10 Double Window Envelopes for ADP Payroll Checks, Gummed Seal, 500 CountDurable and professional envelopes compatible with ADP (Run System) pay stubs #10 envelopes with offset double window designed for payroll Low profile flap design creates a wide opening for easy and quick envelope stuffing Cost saving gummed flap provides the strongest seal when moistened Dark security tint lining keeps your important documents securely concealed throughout transit Its no secret that the #10 security envelope is the workhorse of