For fine periodontal debridement. Patented internal water delivery system delivers water directly to the insert tip and focuses water where it is needed most. Thin design provides improved subgingival access. Enhanced water management is designed to increase patient comfort. Left and right configurations provide more clinical utility and adaptability. 1000 insert combines the bend profile and beveled edge of the FSI 1000 design with the slim tip and focused spray of the FSI-SLI inserts.