Up for sale is 5 (FIVE) Rotary tension wheel discs,
OEM quality (made in Taiwan) for Happy embroidery machines.  This part is for detecting thread tension assembly #HCR16A42.  

Part No. ES-HCR-1607

Size: 28mm (O.D.) x 8.5mm (I.D.) x 4.27mm (Width)
inkFrog