A knapsack sprayer is used to spray insecticides from the ground. Cleaning solution is applied by rotary machine, brush applicator, or compression sprayer. Common sprayer pump types include diaphragm, centrifugal, and roller pumps. The IAR-821 is an agricultural crop sprayer and duster aircraft. Canadian RSX had a significantly larger washer sprayer bottle to deal with harsher weather. See aerial application, pesticide application, sprayer. Some kitchen sinks also come equipped with a sink sprayer. Later attachment options include snowblowers, snow blades, and a sprayer. The original application techniques included the use of a hand gun sprayer. The device is similar to that on a kitchen sink sprayer. Pour spouts, triggers, sprayer cap, measuring attachments, sifting devices, etc. These results compared very favorably with the traditional method of using a hand gun sprayer. The first self-propelled Ag-Chem sprayer was developed in 1967 and was called the Ag-Gator 404SP. In the 1990s, Ag-Chem saw an emerging market for a self-propelled row-crop sprayer. This allows fuel to be shut off from the sprayer by electrical control.