... roller to zinc-plated GCS NH non-drive gravity roller/ gravity conveyor rollerGCS non-drive nylon gravity roller, stainless gravity roller, ... loaded for easy mounting. Or in fixed shaft type.4. GCS non-drive gravity roller could be made of nylon, weld pipe ... , pvc roller, sprocket roller, retractable roller, taper roller, drive roller, non-drive roller. All these roller used in bulk material handling ...