Blue Summit Supplies #8 Double Window Security Envelopes, 500 Pack, Quick Seal

Blue Summit Supplies #8 double window security envelopes are made for mailing business checks, with a 500-envelope pack and a 3 5/8 x 8 11/16 in (9.2 x 22.1 cm) format.

• 24 lb white wove paper — provides the paper format for regular check and financial-document mailing.
• Flip-and-press self-seal closure — lets teams seal envelopes with a quick press instead of licking them.
• QuickBooks check alignment — positions address information for standard check or voucher layouts.
• Two windows and a confidential security tint — show address fields while reducing read-through of check details.
• #8 format in a 500-count pack — supports batches of business-check mailings.

Bookkeeping teams and offices that send payroll checks, vendor payments, or other business checks need envelopes that work with printed check layouts and help keep financial details private. These envelopes bring the window format, closure, and privacy pattern together for recurring office mailings.

How do you seal these check envelopes?

Fold the flap and press it into place to close each envelope. The flip-and-press adhesive closure is designed for quick sealing during check and accounts-payable tasks, without licking the flap.

• No peel strips are needed for the closure.
• The press-to-seal format suits repeated office mailing tasks.

Will the windows work with QuickBooks checks?

Yes, the window placement is made to align with standard QuickBooks check or voucher layouts so the address appears in the windowed area. Two windows show the necessary address fields, while the rest of the check stays concealed within the envelope.

• Made for business checks and vouchers printed in standard layouts.
• Address visibility can help reduce printing adjustments, reprints, and mailing errors.

How do these envelopes help keep check details private?

A confidential security tint pattern helps reduce read-through through the paper. Together with the double-window format, it is designed to show the needed address information while limiting visibility of other check content.

• Privacy support is intended for details such as check amounts, memo lines, and account information.
• The windows reveal address fields rather than the full check.

What size and paper are included?

Each envelope is #8 size and made from 24 lb white wove paper. The pack contains 500 envelopes, giving bookkeeping and accounting teams a supply for recurring check batches.

• Envelope dimensions: 3 5/8 x 8 11/16 in (9.2 x 22.1 cm).
• Designed for business-check mailing workflows, including payroll and vendor payments.

These envelopes suit small businesses, bookkeeping teams, and offices that regularly mail checks and want a matching window format, a press-to-seal flap, and a security tint. They are designed for business-check and voucher mailings where address alignment and reduced read-through matter.