The 10KG Barbell Set contains:
2 x 5KG Olympic Barbell Plates (10kg)
1 x 1.2m Straight barbell bar (with 2 collars) (weight: ~5kg)
total weight: 15kg
Price bought separately: $80
The 2kg dumbbell/barbell weight plates is a single rubberised plate for suitable for dumbbells and barbells. The diameter of the hole is 2.8cm and thickness of the single weight plate is 2.3cm. Weight of one piece of 1 weight plate is 2kg or 4.4 pounds.
If you need more resistance on your dumbbell or barbell to increase your strength, the 2kg weight plate can serve as additional weight or a replacement weight.
Note: weight label on the dumbbell plate is inaccurate but actual weight is correct (2kg/plate).