There are different types of Racking systems . Some are more re-saleable than others especially if they are still being manufactured in South Africa as components and add-ons are readily availble.
KROST K-TYPE
1LK OR 2LK- (Check stamp on the side of the frames- Made by Krost)
DEXION
Still in production
POLYPAL
Still in production
SYMO LOCK. F -TYPE SYSTEM
No longer manfactured by symo, but Acrow or Krost has the tool to make it
LINK 51
no longer manufactured
H - type system
made by Krost
Acrow
Stilll being manufactured