• Aluminium – 5mm thick
  • Mild steel – 12.7mm thick
  • Stainless steel – 6mm thick
  • Maximum diameter circular tube – 370mm
  • Minimum diameter circular tube – 20mm
  • Maximum (inner diagonal) rectangular tube – 340mm
  • Minimum (inner diagonal) rectangular tube – 50mm
  • Maximum tube length – 3000mm
  • Minimum tube length – 150mm