King & Conn OEM Trumpet & Mellophone valve tune-up kit, easy to install. Bumper washers (O-rings) are for 1st and 3rd slides (Silver Flair). Fits King's 600 series and 2055 Silver Flair Trumpets and other King & Conn Brass Instruments, Not for older Silver Flair trumpets with the larger top action spring (not internal to the piston), for that kit see my SKU 16417. Contact me if you wish to verify your model's fit or you need other parts.
