The MESTO 3552 5 Gallon is the perfect backpack sprayer for professional users. It offers plenty of comfort, such as an ergonomically shaped pump lever whose length and width can be adjusted and a shut-off valve with pressure gauge and integrated filter. Holds 5 Gallons (18 liters). Additional Details ------------------------------ Product description: The MESTO 3552 5 Gallon is the perfect backpack sprayer for professional users. It offers plenty of comfort, such as an ergonomically shaped pump lever whose length and width can be adjusted and a shut-off valve with pressure gauge and integrated filter. Holds 5 Gallons (18 liters).