Qwikstrip Finishing IPR Strips Ultimate Pack (90 Strips) . Includes 5 of each: single-sided( all grits), double-sided (all grits),curved(all grits), and 10 serrated strips (.05mm- .50mm). For Cement Removal, Finishing and Polishing, Interproximal Reduction (IPR). Autoclavable, Single Handed Use, Depth Limiting Design. CONTAINS 5 OF EACH: SINGLE-SIDED( .07mm-.18mm), DOUBLE-SIDED (.18mm-.50mm), CURVED(.07mm-.18mm), AND 10 SERRATED STRIPS