This rack and connector set is part of 3D printable parts that help with the improvement of an open source salt spray chamber. The sample holder can be easily adjusted for different angles in the chamber and easily swapped out or used with multiple angles in one chamber for a customized sample rack. Similar racks can cost approximately $100 for a single sample type for specific machines. The customized rack can be easily fitted to any machine.

http://www.appropedia.org/Open_Source_Salt_Spray_Chamber#Design