- for DIN A4-C4 - compatible with all standard filing trays - stackable, shifted stackable and nestable - can handle up to 6 kg LESS CO² EMISSIONEN Treating our resources responsibly: - Manufactured from recycled PET beverage bottles - 6 PET-bottles= 1 filing tray - This innovative stacking solution from helit helps to reduce packaging size and to increase quantity per pallet, thus reduces CO2 emissions related to the transport.