Filter housing made of plastic, black, two-part, consisting of mount (upper part) and cover (lower part):
Socket, approx. 105 mm outer diameter, 48 mm high, with standard thread (DIN EN 148-1) for connection to a mask,
with rubber gasket behind the trapezoid internal thread. Covers each approx. 99 mm outer diameter,
various heights cover 35 = 44 mm high, cover 70 = 62 mm high,
each with trapezoidal male thread and pre-filter chamber with hinged cover