The Phoenix Contact 811969, also known as the KLM 3, is a versatile terminal strip marker carrier designed for use with CLIPFIX 15, CLIPFIX 35, and CLIPFIX 35-5 end brackets. This adjustable-height carrier accommodates labels in a 20 x 8 mm format, making it ideal for clear and organized labeling in industrial automation setups. With dimensions of 10mm width, 21.6mm height, and 27.32mm depth, the KLM 3 ensures precise and efficient identification of terminal strips, enhancing operational efficiency and maintenance in complex electrical systems.