Length: 182 mm Diamater: 25 mm features: Astra 1001 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 Fire test conducted in accordance with BSEN1634-1:2000 and BSEN163-1:1999 by Chiltern International Fire Ltd, test report CHILT/RS06118. Continuous in-house testing up to 500,000 cycles Proven suitable for use on a 50 kg door with a maximum opening angle of 100 degrees Non-handed Radius faceplates available to order Easy to fit with fitting jigs, templates and morticers Complete fitting instructions supplied with every product