HCFA-1500-Compliant to work with Medicare Form HCFA-1500,Medicaid, and other health insurance forms

SECURITY LINING: Security lined to protect any confidential information listed in the HCFA-1500 or other healthcare forms.

FEATURES: 100, 4.5Wx1H window envelopes.

4.5WX1H: Windows assures your contents arrive at their correct location

SECURE: Redi-Seal adhesive closure will ensure your contents stay safe with the licking factor out of mind