If you are using these in the sun (as a mailbox usually is) try using a tougher more UV resistant plastic such as ABS or PETG. Many of my outdoor PLA prints have failed due to the exposure to nature. I find PETG to be a great mix of affordability, toughness, and colors.
If you are using these in the sun (as a mailbox usually is) try using a tougher more UV resistant plastic such as ABS or PETG. Many of my outdoor PLA prints have failed due to the exposure to nature. I find PETG to be a great mix of affordability, toughness, and colors.