Green 12-Cell Tray w/Vented Dome. 1 count. 
Really nice smaller tray w/vented dome. 17.25"L x 5.75"W.
Cells are 2"W x 2"H. Excellent for propagation, isolation, etc. Use 24-cell insert for propagation, leave out 24-cell insert & just use tray for other style pots. Fits in smaller space than regular 1020 trays. Many uses!