The product is a tool designed for precise time measurement and recording. It utilizes an electric spark and electromagnetic mechanism to create accurate time stamps on a paper tape. This paper tape is then used to analyze and record various time-based events. This ensures that users have ample supplies for extended use. The toner paper is essential for creating clear and legible marks on the paper tape, making it an indispensable component of the timing system. Features -Color:Black -Material:Paper -Size:3.80X3.80X0.01cm/1.49X1.49X0.00in -Note: 10pcs a bag -Accurate measurement: the timer paper provides precise time measurements, essential for conducting accurate and reliable experiments -Designed spark timers: perfectly compatible with electric spark dotting timers, ensuring smooth operation and accurate results -Simple to use: easy to set up and use without any complicated instructions, making it accessible for users of all skill levels -Sufficient quantity: offering a generous supply for continuous use in various experiments and teaching sessions -Lightweight and portable: the compact design makes it easy to transport and store, ideal for use in different educational and experimental environments Package list: 10 x bags of timer papers