Our apertures, lenses, deflection mirrors, objectives and filters are suitable for various optical and ultrasonic sensors and applications. You can choose from different sizes and designs such as plastic, aluminum and stainless steel. Our compact and robust optics are characterized by easy installation. Functional principle=Focusing attachment BUS, Design=Focusing attachment, Use=for ultrasonic sensors BUS, Dimensions=12 x 18.4 x 28.1 mm, Material=ABS, Active area=Ø 3 mm, Fastening=Adhesive