PRODUCT INFORMATION Product name: inner tubeMaterial: Butyl rubber(Butyl glue is high temperature and delay aging, long service life. At the same time,the airtightness is also very good.)Size:26/27.5/28/29/700CValve:AV= America Valve= Schrader Valve=SVFV=French Valve=Presta Valve=PV Package included:1 pc inner tube please select Notice:1. Do not use screwdiver or any sharp tools during installment,to avoid cracking tube or tyre.2