The SinuPulse Sinus Irrigator Tip helps clear nasal congestion, post nasal drip, sinusitis, and prevent sinus infections. Recommended by leading health care professionals, hospitals, and universities for sinus and allergy relief. 100% hypo allergenic with gentle pressure control and a form fitting nasal applicator. Fits SinuPulse Elite (SP100, SP220) and Water Pik models (WP20, WP30, WP32, WP60, WP65, WP70, WP72, WP90, SR400. Not for use with WP100 or cordless models).