National Brand 43-649 Laboratory Research Notebook, 4 x 4 Quad Ruled

National Brand 43-649 Laboratory Research Notebook features 100 numbered, duplicate sets with both sheets ruled with four squares per inch on the front of the page and plain on back. First sheet is bound. Duplicate is microperforated for easy removal. Notebook has a genuine Pressboard cover, stitched binding and three-hole punched edge to secure notebook in standard three-ring binders. Project log card with room for 100 entries in back of book.