The LaMotte 1107 is a white plate with a solid black line down the middle, used in tests for measuring total pounds per acre of potassium (potash). This plate is a replacement part for the LaMotte STH Series soil test kit (sold separately). It is constructed of poly(methyl methacrylate) (PMMA) to be lightweight and shatter-resistant. This plate is rectangular and 0.25 x 2.0 x 1.5 inches (H x W x D, where H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back).

LaMotte manufactures analytical reagents, portable water testing instrumentation, and microbiological testing products. The company, founded in 1919, is headquartered in Chestertown, MD.