Qwikstrip Finishing IPR Strips Ultimate Pack, 5 Single-Sided, 5 Double-Sided . Single-Side:.07mm-.18mm. Double-Sided .18mm-.40mm. For Cement Removal, Finishing and Polishing, Interproximal Reduction (IPR). Autoclavable, Single Handed Use, Depth Limiting Design. CONTAINS 5 SINGLE-SIDED (.07mm-.18mm) AND 5 DOUBLE-SIDED (.18mm-.40mm)