Description PRODUCT DETAIL:MULTI-FUNCTION CONTROL HANDLE: Having easy access to all of the controls on one comfortable handle makes it easy to complete tasks so the operatorâs hand never has to leave the handle. ANTI-VIBRATION SYSTEM: The STIHL anti-vibration system helps reduce operator fatigue and provides a more comfortable working experience. ADJUSTABLE SUPPORT HARNESS: STIHL backpack blowers and sprayers are equipped with an adjustable support harness that distributes weight evenly across the shoulders and back, reducing user fatigue. SEPARATE PRESSURE RESERVOIR: With the pressure reservoir separate from the main tank, only a portion of fluid gets pumped. INTERCHANGEABLE PUMP LEVER: The interchangeable pump lever allows for the lever to be mounted on the right or left side. LOW WEIGHT: At 9.9 lbs., the SG 51 is a great, low-weight manual sprayer option. INTERNAL PUMP: With the pump mechanism placed inside the sprayer tank, the internal pump is protected from external damage. WORKING PRESSURE: 40 psi +/-10%