Configurator Knocker 1 Knocker The singold pneumatic knocker is used on bulk goods with material flow problems, such as bridging, shafting and residue buildup, when high speed vibrators or shakers with soft sinusoidal oscillations are not effective. Available options: Mounting 2 Mounting Knockers must be securely attached to the silo wall for effective operation. Available options: Load more… Accessories 3 Accessories Additional accessory specifications Available options: Sound Insulation 4 Sound Insulation Additional sound insulation specifications Available options: 5 Review & Request Configurator quantity −+ Request quote JavaScript must be supported by your browser and needs to be enabled in order to view this page. Configurator quantity Request quote