Add to your play times with increasing the size and sensitivity to your nipples. With a Ring Diameter of 0.5 - 1.2 cm and made of ABS/PVC the Bad Kitty Nipple Pumps will plump up your nipples! Two nipple pumps with red pump balls and eight fixation rings in a set. The slightly elastic rings made of silicone have different diameters. Great for solo or duet play!