Benefits: Constructed of anodized aluminum and reinforced nylon - the durable and versatile unit is nearly indestructible. The stainless steel pumping mechanism is resistant to corrosion - rust and abrasion. The pump has a four-position stroke adjustment to control the amount of soap being dispensed and is excellent for dispensing both mild hand cleaners and heavy-duty formulas that contain abrasives. The pump lever can be operated with hands - elbow or forearm and will withstand daily rugged removal for cleaning. Bottles can be replaced quickly and easily. Slide the square flat-shelf bottle onto the intake tube and snap the gallon in place. There's no pouring - waste or mess.