Material: Gear: open-cell PU foam, pre-oiled with adhesive oil (H1 approval). Axle: stainless steel. Plain bearing.Helical module toothing 19° 31‘, 42‘, ‘, according to DIN 867. Not for torque transmission. The lubrication gear can lubricate a gear or a gear rack. Preferably, the gear should be lubricated. The foam stores the lubricant and releases it in very small doses. The lubricant supply can be done automatically or manually, e.g. with a grease gun.Temperature range: -10°C to +80°C.Note for Helical Tooth System:In the helical tooth system, only right-handle / left-handle pairing is possible. A right-handed gear can only run with a left-handed gear or a left-handed rack (or inverse).