AMIGO Inner Tube This strong inner tube from AMIGO has been crafted and produced with care so that you enjoy the best quality for a very competitive price! Specifications: Inch size: 28 x 3/4-1.00 ETRTO size: 18/25-622/630 French size: 700 x 18/25C Valve type: Auto valve Valve length: 48 mm Colour: black Material: rubber Weight: 130 grams