These frames are produced by E.H. Thorne and flat-packed for self-assembly (includes pins)
- Pack of 10 frames.
D.N.4 frames are used in standard depth National or WBC brood bodies. D.N.4 frames have hoffman spacing side bars.
- Top bar- 17" x 7/8" (431mm x 22mm)
- Side bar- 8½" x 1 3/8" tapering to 7/8" at bottom (216mm x 35mm)
- Bottom bar- 14" (356mm)