Tubular pin tumbler lock - Design. 1  The design of a tubular lock is similar to the pin tumbler lock, in that there are several stacks of pins. The key is a cylinder shape with notches cut around the outer or (rarely) inner edge. Each of these notches depresses a single pin inside the lock to a specific height allowing the lock cylinder to turn freely.
With more than 31,000 retail locations and the most frequently visited website in the federal government, usps.com, the Postal Service has annual revenue of more than $65 billion and delivers nearly 40 percent of the world's mail.
As of May 2014, the United States Postal Service charges 34 cents to send a typically sized postcard to a recipient in the United States. For larger postcards, the rate is 49 cents, and for... As of May 2014, the United States Postal Service charges 34 cents to send a typically sized postcard to a recipient in the United States. For larger postcards, the rate is 49 cents, and for recipients in other countries, the rate is $1.15. For postcards up to 4.25 inches by 6 inches, the domestic rate is 34 cents. For postcards larger than that, the domestic rate is 49 cents, up to a maximum size of 6.125 inches by 11.5 inches. Larger postcards can be sent, but they are treated the same as letters; the postage will depend on the postcard's size and weight.