Lorell acrylic stacking letter trays, green, 2/pack stacking letter trays offer a durable, lightweight design with polished edges. Smooth, curved edges feature a hint of green to emulate the look of real glass. Nonskid feet protect desktop surfaces and keep your important papers on your desktop. Capacity is 2-1/2″. Letter trays are made of durable acrylic and do not require stacking supports for stacking.