Looking for trigger point balls.  Below is a link for the ideal ask but can use any size. thank you

https://www.amazon.com/Trigger-Point-Performance-TriggerPoint-Massage/dp/B073KM47VB/ref=asc_df_B073KM47VB?mcid=b859a69094b4319f942c61a19a93ae2e&tag=hyprod-20&linkCode=df0&hvadid=693769127474&hvpos=&hvnetw=g&hvrand=1909527529388614673&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9003186&hvtargid=pla-348488024102&psc=1