NEW Never Used Massage Gun Heads, 12 Pack Gun Attachments

I bought these on Amazon for my massage gun but they didn't fit the one I had, and I forgot to return them. Never used, just opened package to test them. Amazon product title: KOFOHO Massage Gun Heads,12 Packs Replaceable Massage Gun Attachments Adapter Plug-n-Play Applicators and Trigger Point Different Functions of Muscle Relaxation Massage Gun Accessories 【12 DIFFERENT HEADS】12 Replacement different massage-head attachments, different experiences. 【MASSAGE GUN ATTACHMENT】 Match with fascia gun, using scientific vibration frequency and amplitude, muscles can be activated. 【Easy to carry】 The percussion massage tip is Small and practical, the health care ball is small, easy to use, cost-effective, and can be washed directly with water. the percussion jigsaw massage bit mainly massage large muscle groups, fascia relaxes, reduces soreness and is more effective. 【Note】The inner diameter of this massage gun adpater is 13.22 mm(0.64 inch), the outer diameter of this massage gun head is 18.5mm(0.73inch), allow 1-2mm differs due to manual measurement. 【Important】Please confirm the caliber size of your massage gun before purchasing the product. If it does not fit the buyer's massage gun, it is not the seller's responsibility.