Q-Tubes for Road bicycles most common sizes. These tubes can come with either a Presta or Schrader valve stem. The Presta valve stems also come in lengths depending on the depth of your wheel.
700 x 18-23 in either a 32mm, 60mm or 80mm stem length.
700 x 28-32 in either a Schrader valve or 32mm Presta valve.