British National deep frames DN4, 1st Quality frames supplied in packs of 10's, 50's or 100's for you to assemble yourself.
Lug to Lug - 43.3cm
Internal Side Bar to side bar (wax space)- 33.4cm
Inside Top to Bottom -18.9cm
External top to bottom - 21.6cm
External side bar to side bar 35.6cm