U-Shaped Tube No.: at-03	Brake-lock Castor No.: ac-06	Single Post Fixer No.: ah-18
Double Post Fixer No.: ah-19	Post Clamps No.: ah-20	Adjustable Bolt No.: at-02
Y-Shaped Tube No.: at-04	K/D Tube No.: at-05	Single Tube No.: at-06