Injection Site Tenderness. It is common to experience irritation and tenderness or discomfort if vitamin B12 supplementation is received by injection. These side effects tend to subside after receiving the shot.
The United States Postal Service recommends that mailboxes be 41-45 inches off of the ground and 6-8 inches back from the curb with a minimum recommendation of 4 feet off the ground for those people living in the city.
1 Curbside mailbox posts should be buried less than 24 inches deep and made from wood no larger than 4 inches high by 4 inches wide. 2  Steel or aluminum pipes with a 2-inch diameter are also acceptable.SPS Regulations for Package Mailboxes. A T3 mailbox is sometimes called a large rural or Package Mailboxes. It shares most regulations with standard mailboxes but can accommodate larger items. 1  Dimensions for an approved package mailbox are no larger than 22 1/2 inches long, 8 inches wide and 11 1/2 inches high.