This 6 pack of inner tubes is not only a great value, they are excellent quality. Made with standard weight butyl rubber, reinforced valve stem area and removable valve cores they are a perfect balance between weight and durability. Each tube is individually shrink wrapped so you can toss one in your seat bag or pocket and not worry it about getting damaged or unwound. When paired with nice tires, our tubes are light enough to offer good road feel with the durability needed for modest flat protection. You won't find better tubes for the price.EVO offers the most popular sizes of road tubes in convenient and economical six packs. Never be without a spare. Widths available are 18-23mm, 23-25mm and 35-48mm with valve lengths ranging from 48, 60 and 80mm. Choose what fits your rim profile and tire width. We have found the 18-23mm tubes work fine in 25mm tires and the 23-25mm tubes fit in 28mm tires as well. The 35-48mm work well with larger cyclocross and city bike tires Features: - Six individually wrapped, butyl rubber inner tubes - Standard weight rubber, tube weight 107 grams - 700c/27" diameter - Use with 23-25mm wide road tires, will fit up to 28mm - 60mm Presta valve stem with removable core - Made in China