Reliance Flushable Loo Dimensions: 250- 10.5 in. x 12 in. (26.7 cm x 38 cm); 400- 10.5"D x 15"H. (26.7 cm x 38 cm) Weight: 250-11 lb (4.9 kg) 400-11 lb 14 oz (5.4 kg) Fresh Water Tank Capacity: 250 and 400- 3.2 gal. Holding Tank Capacity: 250-2.5 gal. (9.5 L) 400- 4 gal (15 Liters) can use Reliance Double Doodie Bagging System