BT-7002SA : Cleaning Gun
Made by forge alu body, and with tube type;
the BT-7002B and BT-7002S are same spare parts;
Please check out catalogue, and compare the different type of cleanning guns.
Dry cleaning gun: BT-7007 ( forge and casting body, silve and black color, bearing and tube tornado parts. )
Dry and Wet cleaning gun: BT-7002 ( also same as BT-7007 body, color, bearing and tubes)
But BT-7002 can work with liquid cleaner in the cleaning process.