Swiss Perio Microsurgical Castroviejo Needle Holder Swiss Perio Microsurgical Castroviejo Needle Holder SPNHDPVN Microsurgical castroviejo needle holder designed for smaller needles and provides easy handling of suture diameters ranging from 5-0 to 9-0. Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.