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			Hi Tony, 
		
		
		
			My original ones were two piece which was just as well as the bottom bit was long gone. I would suggest the base would be best out of treated ply. Inside is 4 3/4"x1 3/4" Wall Thickness is about 1 1/8" Depth is 1 3/4" Base is probably 1/2" max Cheers, Terry 
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	Terry F30 13 Cab CMP Morris Commercial C8  | 
		
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