... in some cases many modules (curved and straight conveyor sections) can be driven from one drive unit ... the roller have all kinds, see following:Roller conveyor dia: 25.4mm, 38.1mm, 50.8mm, ... : 1000-3000mmConveyor width: 300-700mmRoller Material: Stainless steel, Carbon steel, aluminum, PVC,Installation method: spring loaded, female ... : 40kgCapacity per meter: 400kg Stainless steel Gravity roller conveyor