These aluminium boxes are perfect for building a balan or band pass filter. These are in fact the ones I use to build the HAMtronics.uk Band Pass Filters.
The height is perfect for fitting a SO259 or BNC or Type N adapter.
The dimensions are 122*66*39.5mm external.
Packing: Box and Lid are Shrink-wrapped, and Comes with 304 Stainless Steel Screws.