Seems as if your sub needs to be nice and quiet; this butterfly gag will help you silence them.
Place the gag into their mouth, and let them know
that they are going to be quiet for a while. If they have even the
slightest bit of disbelief, start squeezing the pump. The gag will
inflate inside of their mouth and truly make sure that they are unable
to speak. Turn a silent slave into an obedient one.
Measurements: 16 inches in total length. Gag measures 5 inches across and 1.25 inches deep uninflated, 3 inches deep inflated
Material: Latex, plastic
Note: Take great care not to over inflate and cut off air flow. These
products as with all products on this site are supplied AS IS. No
warranty is given either implied or expressed. Products are intended as
novelty only, and no representation is made or implied as to their
suitability or safety for any particular use. Purchasers use the
products entirely at their own risk. The manufacturer or re-seller is
not liable for any direct, indirect, incidental or consequential damage
or loss howsoever arising caused by use or misuse of the products. This
includes, but is not limited to, damage to the products and personal
injury or damages due to use or misuse.