BS DN4 Hoffman Brood Frames & Pins
Self spacing brood box frames suitable for British National,WBC and Smith hives if the top bar lugs are shortened.
These are flat packed Brood/Deep British National frames with gimp pins.
They are self spacing and mostly used in British National, WBC and similarly sized beehives.
The frames are A grade quality and can be used mixed with DN1 frames if plastic spacers are also used.