13 or 17mm stack height Smooth operation and high performance Designed as a pair of hinges for sidehung windows. Capable of holding windows in any open position by means of friction. Designed by Securistyle a leading manufacturer the Defender range of friction hinges is tough durable and offer truly reliable weather sealing of uPVC and aluminium windows. Features & Benefits Enhanced weather sealing enclosed end caps asymmetric location system and profiled vent are all help Long life expectancy uses Thermoplastic components and tested to 30000 cycles Smooth operation patented lipped slider Easy friction adjustment without metaltometal contact Friction screw misuse eliminated robust cam friction device High standard weather sealing BS6375 Part 1 Quality Ferritic steel BS EN ISO 100882 Grade 1.4016 Product Specification Side Hung Hinges Hinge Length Max Vent Weight Max Vent Width Min Vent Width Hinge Dimension Opening Angle + 2...