Tritus™ (IPA) Flush Arm Restrictor for Side Hung Windows SKU: Tritus Flush Arm Restrictor for Side Hung Pinit Quantity discounts available QuantityPrice Quantity -+ Add to Basket DescriptionSafety arm and plate restrictor for Tritus (IPA) Side Hung Flush Casement Windows.For use with the FH70, FH80 and FSS314 hinges.As viewed from the outside, a left hand restrictor would be fitted on the sill of a left hand Side hung window, right hand would be the opposite of this.VideosDocumentationTechnical DWG Drawing: DownloadTechnical PDF Drawing: Download