RubberMaid Shelf Support Bracket
thingiverse
Had a RubberMaid Outdoor Storage Box with a shelf in it. The shelf support broke, so I made this one to replace it. I increased support structures as I planned it for PETG but it would probably work well ABS as well. You can print higher quality than .2 if you want but, its a shelf support. More important to do 100% infill though.
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