Four Hole Back Plate for 30mm upright
Extreme

Four hole 8mm galvanised back plate.

41X41 back plate to suit 30mm tall crossmember with a 30mm wide upright

41X51 back plate to suit 40mm tall crossmember with a 30mm wide upright

41X61 back plate to suit 50mm tall crossmember with a 30mm wide upright

41X71 back plate to suit 60mm tall crossmember with a 30mm wide upright

41X91 back plate to suit 80mm tall crossmember with a 30mm wide upright

These can also be used to mount various box sections together with the correct u bolt