This conveyor is named "Z Spiral" because it direct drives any belt with nearly zero tension, and because it has nearly ZERO hidden places to grow bacteria in the product zone. The Z Spiral design is basically a super lo tension system, yet it also has benefits similar to stacker systems. Z Spiral eliminates most of the negative issues of both lo tensions and stackers, and far exceeds their combined benefits. Z Spiral is a creative step up in better design, and a giant leap in benefits for your plant productivity, sanitation, and maintenance.