@winter2019-66Nipple Suction Set Medium - Transparent. Feel the stimulation of suction with these Nipple Cups. These suckers can be easily applied and twisted to temporarily increase the size of the nipples. Perfect for use during solo or partner play. Enjoy creating heightened sensitivity and stimulation! Compatible with all types of lubricant. Use for no longer then 20-30 minutes for both breasts. @vday2020-39