Quality Park Business Envelopes, Security Tinted, Box of 500 (QUA21432)
No. 10 1/2 envelopes are designed for use with Insurance Form CMS-1500 and similar forms. The 1" x 4-1/2" window positioned 4-1/4" from the left and 19/16" from the bottom of the envelope. Inside security tint offers more privacy. 24 lb.