Set of sheets of 1206 Tray Inserts Each sheet will fill a standard 1020 plant tray either with or without holes Each sheet divides into 12 packs of 6 cells each Enough space for 72 plants per sheet Lightweight Each cell measures 1.55 long x 1.55 wide x 2.33 deep Designed for single season use Manufactured in the USA by Landmark Plastics May be broken down into half or quarter sheets for shipping Seed Starting - 1206 Inserts For Growing Trays | 12 Trays Of 6 Holes Per Sheet