Adams 1099 Envelopes are security-tinted for privacy and sized for a precise fit with 1099 tax forms with two forms per sheet. Durable, gummed closure provides an aggressive seal. Complex security tint conceals the appearance of letters and numbers, even when held to light. Perfectly aligned double windows keep personally identifiable information out of view. Envelopes are designed to fit 1099 MISC, 1099-R, 1099-DIV, 1099-INT and 1098 tax forms.