Here is an immobilization strap with handcuffs and ball gag . 
The gag is adjustable and the comfortable ball is pierced for breathing. 
The length of the strap is adjustable as well as the handcuffs with Velcro closures . 
Connected by a carabiner to the main strap, the handcuffs are removable. 
Advantage: a mask is offered .
 
Box in mm: 210 x 130 x 45 - Weight 140grs - Ball diameter 4.2cm - Strap 31 x 4.2cm - Gag 46 x 5cm 
Composition Polyester, ABS & Metal -