SGC is a market leader of rigid mailing envelopes, custom designed and printed folding cartons and small flute corrugated boxes. Stock products include the nationally known Stayflats™ and Stayflats Plus ® brand of rigid mailing envelopes, Postage Saver® lightweight rigid mailers, Expand-A-Mailer™ gusset envelopes,and ConfirMailer™ USPS approved mailer for Delivery and Signature Confirmation.

The stock line also includes 30 + sizes of Kraft reverse tuck folding cartons. Specialty products include windowed cartons and mailers, POP display boxes and easy open/easy close boxes and mailers.