Perfect for all physics laboratory write-ups, this exceptional notebook is easy-to-use for both students and researchers. The recycled, carbonless paper makes this a clean and convenient notebook for laboratory write-ups. Each duplicate is micro-perforated and three-hole punched for easy removal and organization. With duplicate copies, instructors do not need to collect entire notebooks, making grading easier, and ensuring that students will not lose their labs.  Each notebook contains 50 duplicated number sets plus 25 pages of metric graph paper.