It is the electronic control unit that manages the operation of the sprayer

1 quart container

Quick release bowl guard and spin off filter element

Large 3/8” inlet to reduce clogging

Using a 3/8 hex wrench remove the upper seat retainer

Graco LineLazer 130HS Standard Series 3300 PSI @ 1.3 GPM Gas Hydraulic Airless Line Striper, 2 Manual Guns - Cart reprice It is the electronic controlThe LineLazer 130HS is the preferred hydraulic airless striping unit that consistently delivers everyday striping performance with proven power, day in and day out. EasyMark Gun Adjustment System Easy Gun Adjustments Perfect gun alignment every time with easy to use guide mark system 2 gun capability with QuikSelect gun selector EZ Align Wheel System Perfect Striper Tracking Simple front wheel alignment, no special tools needed DualComfort Handlebar