This Customs icon is made in Material Design style developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,500 icons, all in the same style and quality.
Idea of Customs Icon by Galdino Pisano
We've received the idea on July 16, 2012 and created the icons on March 25, 2015
Translate in the wonderful Icons8 format, the AIGA Symbol Signs (legacy 1974 & 1979) http://www.aiga.org/symbol-signs/