Form: This specification covers paper base honeycomb material having a cell size of 0.330 or 0.440 in. (8.38 or 11.18 mm). Unless otherwise ordered@ size 0.440 in. (11.18 mm) be supplied. Application: Primarily for use as a core in sandwich construction of light weight partitions@ space fillers@ and non-structural parts. This product is not intended for aircraft structural or exterior applications.