Traveller: aluminum, hard coated
Ball bearing: Balls made of Torlon, abrasion and wear resistant, temperature resistant
End caps: high quality plastic, Metal parts: stainless steel
with parking track
Your advantages:
traveller: aluminum hard coated
ball bearing traveller: aluminum hard coated
balls: Torlon (extremely resistant)
end caps: high quality plastic
metal parts: stainless steel
with parking track