A Probender file is a type of pre-curved or pre-bent stainless steel hand file used in endodontics, often for initial canal negotiation. Pack Contains: - 1 x #17/08 - 19 mm. - 2 x #20/04 - 25 mm. - 1 x #25/04 - 25 mm. - 1 x #30/04 - 25 mm. - 1 x #35/04 - 25 mm.