好像是100用的，不知900可以吗http://www.waterpik.com/oral-health/products/accessories/WAT-20009809/ Water Flossers Complete Care Sonic Toothbrushes Accessories & More WP-100 For use with this water flossers Replacement Hose/Handle Assembly for WP-100| Back WAT-20009809 Replacement Hose/Handle repair kit for WP-100 This replacement hose/handle assembly can be used with these water flossers: Ultra (WP-100) $8.99 retail One handle/hose assembly