This replacement Timer Knob is made to fit most timers. This timer knob can be used on the Zenith Spinalign IST Table, Spinalator IST Table, ATT 300 IST Table, ATT 400 IST Table, Quantum 400 IST Table, & Hill Anatomoter tables with 30 minute timers.
Free shipping is USPS! Zenith Spinalign IST Table Timer Knob,Spinalator IST Table Timer Knob , Att 300 IST Table Timer Knob,Att 400 IST Table Timer Knob, Quantum 400 IST Table Timer Knob, Hill Anatomoter table Timer Knob,replacment Timer Knob
Delivery time was changed, but everything worked out well.
The product was a little different than the original product and it was very tight to put it in. I was afraid that I might break it.