Length: 264 mm Diameter: 30 mm features: Astra 3003 concealed door closer Incorporating unique hydraulic piston assembly offering a controlled rate of door closure together with an adjustable \'snap action\' for overcoming the latch The Astra 3000 is tested and proved suitable for use on a 1/2 hour and 1 hour fire door Test conducted in accordance with EN1634-1 by Chiltern International Fire Ltd, test report CHILT/RF06118 Continuous in-house testing up to 500,000 cycles. Suitable for use in accordance with building regulations 2000 approved document B for fire safety and approved document M for access to and use of buildings Radius faceplates available to order Easy to fit with fitting jigs, templates and morticers Complete fitting instructions supplied with every product