AirForce Holding Tank Vent Filter - Direct Replacement For Dometic SeaLand SaniGard 1-1/2&rdquo; Hose Size High Performance longer lasting odor control. Fits original bracket and hose connectors perfectly and securely. High flow design with impregnated activated carbon media. Replacement for Dometic SeaLand SaniGard 1-1/2" (38mm) vent filters. WILL NOT replace ECO green or black filter. Made in the USA.