Material specifications for the SendPro C, SendPro+, SendPro C Auto

Envelope Size

• Minimum: 3.5 x 4.75" (88.9 x 120 mm)
• Maximum: 13 x 15" (330 x 381 mm)

Envelope Flap Depth

• 3" (72.2 mm)

Envelope Thickness

• Minimum: .02" (0.20 mm)
• Maximum: 5/16" (8 mm)

Stack Height for Mail

• 3" (76.2 mm) - this is the height of the inner edge of the side guide

Envelope Weight

• Minimum: .035 oz. (1 g)
• Maximum: 16 oz. (450 g)

Tape Size

• Minimum: 1.75 x 4" (44.2 x 100 mm)
• Maximum: 1.76 x 8" (44.7 x 200 mm)

For a proper seal, the envelope’s minimum flap angle must meet the following criteria:

• For envelopes with a flap length from 25 to 60 mm (1 to 2.36 inches), the minimum flap angle is 18 degrees.
• For envelopes with a flap length greater than 60 mm to the maximum flap length for the particular model, the minimum flap angle is 21 degrees.