Smooth operation high performance These hinges are designed to stay in any open position by means of friction and are designed for sidehung windows of uPVC or aluminium . The Defender range of friction hinges designed by leading manufacturer Securistyle is tough durable and offer truly reliable weather sealing . 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 + 2.5 12 310mm 48lbs 22kg 23.6 600m...