The tunnel wants to be filled...!Hollow butt plug with a stopper that prevents the plug from slipping in too far. Perfect for refreshing enemas and games with a mini vibrator. Exclusive, transparent design made out of borosilicate glass. Holds up to 118 ml.Complete length 12.2 cm, width 7.1 cm, inner Ø 3.6 cm. Borosilicate glass.