T.O. Plastics thermoforms quality plastic plant trays including standard inserts and flats. Our standard inserts have straight walls that offer greater soil capacity for a larger, healthier crop, and they are engineered to de-nest easily. Standard inserts are designed for use with our 1020 standard flats, which are sturdy, yet lightweight for easy handling. Our standard inserts combined with our standard flats create an efficient system that is ideal for filling, growing and shipping plants.