Screen Printing Company. Lefthand Promotions is a screen printing company in St. Louis that specializes in t-shirt design and custom embroidery. Do you need a t-shirt designed for a special event? Have an original design idea that you’d like to put on a hat or backpack? Our experienced design team has over 30 years of experience and can create anything you’d like. For more information on our screen printing company, contact Lefthand Promotions today.
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