... easily combined, in some cases many modules (curved and straight conveyor sections) can be driven from one drive unit. Simple ... and appearance is beautiful.SpecificationsThe diameter of the roller have all kinds, see following:Roller conveyor dia: 25.4mm, 38.1mm, 50.8mm ... : spring loaded, female/ Male thread, full mortise.Capacity per roller: 40kgCapacity per meter: 400kg Gravity roller conveyor