Replacement collar strap made of nylon material, touch and waterproof with quick-release buckle.
 
It fits  6"- 24" neck size.  Width 3/3" (20mm). Fit many brand model receivers including  GROOVYPETS T720 /GP330, Aetertek AT-216D/ AT-211D/AT211, Koolkani KK360/KK9000, EasyPet EP-380. It works with any collar receiver that can allow the strap to attach to it.