Magnent organizational case fro Mylar, metal/black backing

This is for a robot arm setup using Sketch bot or others.  Please choose the correct color.

MYLAR CASE: This case holds 1000 qty mylar pieces.  You can open it on site and have two separate stations for making magnets.  This is the color WHITE.

METAL BACKING CASE: This case holds 500 qty metal backing pieces.  You can open it on site and have two separate stations for making magnets. This is the color SILVER.

BLACK BACKING CASE: This case holds 200 qty black backing pieces.  You can open it on site and have two separate stations for making magnets. This is the color BLACK.