This scale is not the same model that appears in some of the videos.  It is slightly smaller. 

This scale measures with precision in 4 modes (g, oz, ct, and ozt).  Bright backlight display for easy reading. Perfect for measuring the correct ratios of resin and hardener for epoxy and gelcoats. Comes pre-calibrated out of the box.

   - 4 Modes (g, oz, ct, ozt) 
   - 650g capacity
   - 0.1g precision 
   - Tare Functionality 
   - Backlight LCD 
   - Compact Size (3 1/2" x 2 5/16" x 3/4") 
   - Low Battery / Overload Indication 
   - Auto off Functionality 
   - Powered by 2xAAA Batteries (included)