Binding : Apparel Product Description Ultimate Pi Day only happens once in a lifetime and is coming up on March 14, 2015! Make sure to grab a keepsake for this memorable day in math history. These fun printed garments are a great personal touch on you, or as a gift to a friend or loved one! Great for all-year-round too! Colors may differ from image, as each monitor is made and calibrated differently. 0
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