4mm: is otherwise called baby metal

6mm: This is otherwise called ¼ inch

12mm: This is otherwise called ½ inch

20mm: This is otherwise called ¾ inch

40mm: This is otherwise called 1 ½ inch

All there are used mainly for concreteing.

When we meet a client we should ask 

How many cubic feet he need?

Location of the project?

Vehicle accessibility?

Minimum order quantity is 150