The Newborn VR400A83 dual-component variable ratio pneumatic adhesive applicator, also called a two-part or two component applicator, can accommodate 400 mL cartridges in ratios of 1:1, 2:1, 4:1, and 10:1 and has 100 psi of pressure for applying two-component epoxies and other adhesives. The 100 psi pressure allows the applicator to be used with high viscosity materials. With a 2-1/2"-diameter cylinder, it has a nominal thrust of 490 lb. The adjustable air pressure regulator controls the flow of the material, and the air dump valve quickly stops the flow. The push discs snap in and out, and the applicator can be loaded from the side for quickly changing the sizes of the adhesive cartridges. Caulking guns, also called caulk or cartridge guns, dispense a controlled flow of products such as caulk, sealants, and adhesives from a tube or cartridge. A manual caulking gun consists of a frame which holds the tube, a trigger, and a rod which moves forward when the trigger is depressed, dispensing the product. Manual caulking guns have a thrust ratio; the higher the thrust ratio, the easier it is to dispense the caulk, sealant, or adhesive. Air-powered or pneumatic caulking guns also have a frame and a trigger, but are used with an air pressure regulator that pushes the product from the tube using air pressure instead of a rod. Newborn Brothers Company, Inc. manufactures sealant and adhesive dispensers and accessories. The company was founded in 1974 and is headquartered in Jessup, MD.