This document is a quotation for a QTJ4-25C concrete block making machine. It includes the unit price of $24,300 for the machine including additional components like a PLC computer control system, mould, conveyor belt, mixer, and stacker. The machine uses flat and mould vibration compression to manufacture concrete blocks with average density and high strength from various raw materials like crushed stone, sand, cement and fly ash. It has dimensions of 6400x1500x2700mm, a rated pressure of 16MPa, and can produce different sized blocks at rates from 576 to 1260 pieces per hour.