Balloon film check valves, 5 per sheet. This listing is for 10 sheets, 50 pieces total. For those who want a lot, please inquire about 20 sheets, 100 pieces for 699 yen. Ends when supplies run out. Please purchase only if you understand how to use this immediately upon seeing it. Questions about usage other than the condition of the item are not accepted. As this is a clearance item, it is considered junk. Although it is new and unused, there are wrinkles and peeling edges, please check the images. For safety, I will list it as "like new". ◯ Please check my profile. I have dogs and am a smoker. #Balloon #Valve #CheckValve #ProfessionalUse