That gag is the "liplocker" by Lew Rubens, available at hottbonds.com

The Hunter has Kali & JJ bound up in his cellar. Their arms tied off to the ceiling and their mouths connected by a two strap ballgag. The women balance in their stiletto heels with their mouths intertwined and they just can't get much relief. After just a few minutes the Hunter decides to pull JJ's arms up higher and to take the gag out of Kali's mouth. He shoves a pair of panties in her mouth and wraps her head tightly with tape and then pulls her arms up into a painful strappado. He does the same thing to JJ an... Show more