Smiths Architectural Overhead Door Closer Size 2-4Fire tested to EN1634 Suitable for fire doors up to 60 mins Power size EN 2 4 Tested to 500,000 cycles Adjustable closing speed Adjustable latch speed Adjustable backcheck Universal opening Opening angle 105 Cover, arm, parallel arm bracket & fixings included Suitable for doors up to 2100mm x 1100mm & 80kgFeatures Fire tested to EN1634 Suitable for fire doors up to 60 mins Power size EN 2 4 Tested to 500,000 cycles Adjustable closing speed Adjustable