drainage structures, namely, drain channels; drainage structures, namely, trench drains; drain end caps; drain mats; drain grates; drain bases; leaf guard covers for drain pipes; gutter covers; secondary moisture drainage apparatus, namely, troughs; secondary moisture drainage apparatus, namely, silt boxes; secondary moisture drainage apparatus, namely, collection boxes; drain pipe attachments;, namely, end outlets, corners and tees; all of the foregoing being non-metallic