in.This douche adapter is specifically made for easy clean convenience. The 1 piece threaded plastic nozzle fits most standard size water bottles. Easily fits in your pocket, bag, or backpack, for an on-the-go clean. Just find a bottle of water, screw it on, and youre ready to go! - Fits most standard size water bottles - Includes sanitary storgae and travel cap - No leak design - 2.5in.in. (6.35cm) plastic nozzle Lubricant safe.in.