Quality Park Redi-Seal HCFA-1500 Claim Envelopes

Single Window - #10 1/2 - 4 1/2" Width x 9 1/2" Length - 24 lb - Self-sealing - White - Wove - 500 / Box. Designed for Healthcare Claim Form CMS-1500 and similar insurance forms. Window measures 1" x 4-1/2" and positioned 4-1/4" from the left edge and 1-9/16" from the bottom to accommodate addressed mailing.