These Stacking Tray Wormeries take advantage of the 'surface-feeding' nature of Tiger Worms. As the unit fills, the worms follow the food upwards through the trays leaving behind their rich organic compost. By the time the top tray is full, the bottom tray is ready to harvest, so you simply empty it & pop it back on top! Liquid fertiliser gathers in a chamber at the bottom where there is an easy-twist tap to drain it into your watering can. It's simple to assemble, and can be stored inside or out. Made from high quality, 100% recycled plastic, with a 5 year warranty on materials & workmanship. Complete with integrated st&, drainage tray, coir brick shredded paper & anti-acid lime mix, fresh Tiger Worms & a 16 page illustrated instruction guide. Available in two sizes. Please allow up to 14 days for delivery.3 Tier: 41cm (16) x 41cm (16) x 36cm (14) high. Capacity 78 litres.4 Tier: 41cm (16) x 41cm (16) x 43.5cm (17) high. Capacity 99 litres.