The 4.9 gal (140 L) round is a compact size that does not need to worry about the installation space, but it is small but thick, and it is made in Japan. The original water collector of the same manufacturer is also included for easy installation. 1. Water Storage Capacity: 2.9 gal (140 L); Compact size that does not worry about installation space; 3. There is a water supply port on the left and right side, so you can connect it to the downspout on either side. 4. Lid and drain opening make cleaning the inside of the tank easy. 5. Includes original water collector with filter (compatible with round door 2.4 inches (60 mm) and square door 2.4 inches (60 mm) included); 6. Can be linked together.