Valve knob for the DriMaster 2 upholstery tool. Blue plastic attaches with a 5/64" allen head set screw. 000-061-146 KNOB-DRIMASTER TOOL VALVE KNOB, DRIMASTER
This copper tube is 3/16 OD x 2.69 LG x .030 wide. It's used on the old style 1st generation DriMaster upholstery tool, between the spray bar and the solution valve on the inside of the hand tool...