Solvent free, Chemical resistant material. Very thick, 2 mm thick body. One set of O-rings and gaskets provided extra for future use. Comes with continues operation button. Pour Two liter of fluid and pump in for 30 times and adjust the nozzle for either fine mist or for pressure jet. Very useful for gardening, spraying pesticides, spraying perfumes, cleaning purpose and many house hold works. Picture shows 1 liter but you get two liter item.