Answer: reglets

AnswerCrossword Clue
REGLETSFlat moldings.
regletsa. groove for guiding or holding a panel, window sash, etc. b. narrow, flat molding; fillet
regletsa. thin strip, usually of wood, less than type-high, used to produce a blank in or about a page of type b. such strips collectively
regletsREGLET, a flat, narrow moulding