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

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Products affected: SendPro® C, SendPro®+, SendPro® C Auto (2H00, 8H00, 9H00)

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)

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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.

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UPDATED: October 28, 2020