145.zip Apr 2026

: More than 1/4 inch but not more than 3/4 inch thick.

: It is a thermoregulating, mid-weight wool-nylon blend designed as a versatile base layer or next-to-skin piece. 145 Mail Preparation - Postal Explorer - USPS 145.zip

: Mailings must consist of at least 200 pieces (or 50 pounds) but no more than 5,000 pieces per day per 5-digit ZIP Code. : More than 1/4 inch but not more than 3/4 inch thick

: Delivery statistics and route information must be obtained using the USPS EDDM web tool . Physical Standards for 145 Flats 145.zip