Bee Frame spacer - 22mm wide frames, gives a 11.75mm space between frames

This is a spacer to fit over a wooden bee frame - meaning straight National frames typically used with castellated spacers then have Hoffman spacing - very nearly 1 3/8".

Precisely: these added to 22mm (Straight National) frames give 33.8mm spacing where Hoffman is 34.9mm (Hoffman 34.9 is not counting clearance which you'll need)

These have 4x holes at 1.2mm down each side, for conveniently adding pins to hold the plastic to the frame.

The chamfer version has 2.0mm holes plus a chamfer