Bobrick B-3949-57 SkirtBobrick 3949-57 Skirt for Semi-Recessing and Surface-Mounting4″ skirt used to semi-recess a recessed Bobrick unit with a cabinet depth of 7 7/8″.4″ skirt used to surface mount a recessed Bobrick unit with a cabinet depth of 4″.Skirt is 18-8, Type-304, 22-gauge (0.8mm) stainless steel with satin-finish.Drawn and beveled, one-piece, seamless construction.Skirts are used to adapt recessed equipment to either semi-recessed or surface mounted.TrimLine Models B3803, B-38034, and B-39003 should be shimmed with washers between back of cabinet and wall support backing to fill space. This avoids distortion of cabinet back.Use with Recessed Bobrick Model Nos.:B-3944, B-3947, B-3961, B-39617 (Semi-Recessing), B-3974, B-39747, B-39003 (Semi-Recessing)