Amazon
Waterpik Classic Jet Tip, High-Pressure Water Flosser Tip Replacement, JT-450E,(Pack of 2)(assorted colors)
BrandsMart
Waterpik JT-450 Classic High-Pressure Jet Tip
Walgreens
Waterpik Classic Hand Held Cordless Jet Replacement Tips, JT-450E - 2.0 ea