Quality Park QUA21432 21432 Health Form Gummed Security Envelope, #10 1/2, 4 1/2 x 9 1/2, White (Box of 500)
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.