Model SP150 joins line of 5 manual sprayers (largest size consists of 5-gal. backpack version). Shows liquid level in U.S. and Imperial gallons, as well as liters. Tank consists of UV.-protected, corrosion-resistant polyethylene. Has large opening for filling sprayer. For comfort, tank contours to wearers hip, plus padded shoulder strap adjusts as needed. Handle allows manual pump operation, plus eases carrying.