Used: Pass the Water Supply Systems Technician Exam 2021. Sticky notes are attached, but there are no markings. It's in good condition as I used a cover. I will also include a handmade collection of Nikken Gakuin problem sets in card format, designed for easy memorization and efficient, focused study of key points. Please see the images. I believe this set is sufficient for studying, even for those with limited time. I passed the exam on my first try using this set. You can obtain materials for missing years online, etc. Please consider this item, understanding that it is used and includes handmade materials.