item: 10kg,15kg,20kg,30kg,40kg

components:
1KG*4+1.25KG*4+35CMbarbell*2
1.5KG*4+2KG*4+35CM barbell*2
1.25KG*4+1.5KG*4+2KG*4+40CM barbell*2
1.25KG*4+1.5KG*4+2KG*4+2.5KG*4+47CM barbell*2
3KG*8+2.5KG*4+1.25KG*4+51CM barbell*2