“Vacuum play with these Mister B Tit Cylinders is a perfect way to make your nipples bigger and more sensitive.Manufactured in the UK to the highest standards of perfection, these vacuum nipple cylinders easily beat the quality of other brands. Main advantages are that we only use original CDC-couplings which (almost) never fail or leak, and that the vacuum stays in place when you disconnect the pump.Sold per pair, available in two sizes: 11mm and 22 mm internal diameter. If you need bigger cylinders (with large piercings for instance): check out the LAPD Tit Cylinders, the Tit Suckers or the Chinese Cupping Sets, also available from Mister B.Sold per pairAvailable in 15 mm and 22 mm internal diameterOriginal hi-end coupling which (almost) never leak or fail – unlike Chinese copiesMister B Vacuum Pumps advised for pumpingUniversal couplings, also fit on LAPD, Dr Kaplan and Boston PumpsPerfect seal by embedded O-ring constructionVacuum remains when pump is removed.”