- Casing: thick pressed steel, swivel castor casing with heavy fork and plate fitting, with very stable central bolt, with flange seal, bolted and locked, with double ball bearing in the flange, reinforced by means of four specially designed hardened bushes, giving high insusceptibility to shock and impact, bolted wheel axle, zinc plated and chromated.
- Wheels: ALEV tyre: elastic solid rubber, smooth running qualities, colour black, 65° Shore A, vulcanised, unbreakable joint, minimal rolling friction.
- Rims: cast aluminium, corrosion-resistant, with ball bearing, colour aluminium.
- Additional remark for size description:
- K = ball bearing.