IF-10 Insert 25k-30kGeneral Scaling Insert Great "Universal" general scaling insert with internal water flow for increased clinician visibility and greater patient comfort. Use up to medium power. Great on tenacious calculus. IF-100 Insert 25k-30kInternal water flow for increased clinition visibility and greater patient comfort. Slim design for subgingival scaling. Use on low to medium power range only.IF-1000 25k-30kInternal water flow triple-bend insert for interproximal access.P-10 Insert 25k-30kClassic Style Scaling Insert The "Original" ultrasonic scaling insert with external water flow, designed for removing all types of debris. Use on full power range, heavy duty universal scaling.P-100 Insert 25k-30kSlim Insert Slim design for subgingival scaling. External water spray tube allows for use in a higher power range than internal spray "IF" tips.