The Gentile Packaging Machinery Piston Filler is a semi-automatic, air operated filler. Range of fill is up to 1000ml (33.8oz) depending on the size of the piston and cylinder supplied. Standard sizes are 10ml-60ml, 30ml-250ml, 125-ml-500ml, and 250ml-1000ml. The fill volume is easily adjusted by hand and is accurate to +/- 1%. The GPM Piston Filler comes with an adjustable bottle tray and V style bottle guide to accommodate various bottle sizes and styles. This filler is very easy to set up, clean, and change over. Product cycle is initiated by pressing a foot pedal.