145.zip File

: All mailpieces must be separated by delivery route or Post Office Box section.

: 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

: Delivery statistics and route information must be obtained using the USPS EDDM web tool . Physical Standards for 145 Flats : All mailpieces must be separated by delivery

: More than 11-1/2 inches but not more than 15 inches long. 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.