500 envelopes per box.
500 Envelopes Quality Park #10-1/2 HIC Form Window Envelopes 4.5″ x 9.5″ White
The reflex blue tint pattern makes it impossible to see the details of the contents, even when held up to the light. 500 Envelopes. Window envelope is specifically designed for Healthcare Claim Form CMS-1500 and similar forms.
