Exaco Replacement Piston for Janssens Heavy Duty OpenerExaco Replacement Piston for Janssens Heavy Duty Opener The Exaco Replacement Piston is specifically designed for the Janssens Heavy Duty Opener, ensuring optimal compatibility and performance. Crafted with precision engineering, this piston restores the openers efficiency and reliability, extending the lifespan of your equipment. Made from durable materials, it withstands rigorous use in demanding environments, minimizing downtime and maintenance