THE HEAVIER THE BETTER.
Designed specifically for the Gorila Tactical Plate Carrier, the Gorila Plate Kits are sold in pairs. The Gorila Tactical weight vest weighs 3,5 lb so the 14 lb kit weighs 10,5 lb total, that's (2) 5,25 lb plates. Same for the 20 lb kit, it's actually (2) 8,25 lb plates for a total of 16,5 lb.
Those plate are not to be used as body armor.