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U Channel Grate Only: [single grate only]

  mm icnches
Length 500 19 & 1/2
Width 125 5

U Channel Base Only

  mm icnches Notes
Length 1000 39 & 1/2  
Width USA 150 6 [with TWO grates in U Channel Base]
Width Australia 140 5 &1/2 [with TWO grates in U Channel Base]

Rainwater Pit Grate Only

  mm icnches  
Length 245 sq 9 & 1/2  sq  

Rainwater Pit Only

  mm icnches  
Top 250 sq 9 & 3/4 sq  
Depth 280 11