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Old February 11, 2018   #3
rhines81
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Join Date: Mar 2015
Location: Zone 5A, Poconos
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These are a bit more pricey but they should work for you. Bottom internal dimensions measure 21.125"L x 14"W.
http://www.greenhousemegastore.com/p...-trays-inserts
The bottom dimension of those plug flats certainly look smaller than a 1020, but if they say they do not fit, you have to go by that unless you can find a flat and try it out yourself before you buy.

Last edited by rhines81; February 11, 2018 at 11:04 AM. Reason: 1020 Trays have a bottom ID of 20"L x 9.625"W
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