This bearing housing combines a linear ball bearing with a housing unit into a single mounted assembly, allowing direct installation without separate alignment of the bearing element. The unit measures 43.0 mm in width and 35.0 mm in height, with a net mass of 0.29 kg. The housing is sealed on both sides and supplied greased, with a relubrication facility built into the design for maintenance without disassembly. The sealing arrangement protects the ball bearing raceway from dust and moisture ingress during linear motion along a shaft, while the relubrication facility supports periodic replenishment of the grease fill to sustain running performance over the service interval. The corrosion-resistant design option makes the KTB12-B-PP-AS suitable where the housing or bearing components are exposed to humid or aggressive ambient conditions, without altering its mounting dimensions or basic function as a linear guide support.