400mm x 6mm.
A Bundle of 4 pegs.

Yip that's alot of Spring steel, making them very reliable.
Often used for canvas/military tents. 

When putting up a bigger tent or in sandy soil these are the pegs to go for.
 
"That's not going anywhere" - Dad 
 
Quality spring steel ensures  our pegs don’t bend- beware of  cheap imitations!