The state-of-the-art waste Disposers from Franke take less time to do the job, grind to septic system compatible levels of fineness in all models and use less energy. These energy efficient waste Disposers are superior in every way from price to performance. Bio shield antimicrobial agents molded into internal components of disposer to inhibit the growth of bacteria and thereby reducing odors (typical germs protected by Bio shield are Escherichia coli and salmonella). silver guard*: magnetic rim keeps metal objects from falling into disposer and causing damage. The Franke Disposers feature and insulated shell for noise dampening and stainless steel interior construction for lasting performance.