Highly compatible brands/models include Kids Bike 18 Inch, Fairy 18" Kids Bike, Pluto 18" Kids Bike BMX Cycling Kids Bike Size:AV32mm Schrader Valve. Fit in 18 x 1.75 18 x1.90 18 x 1.95 18 x 2.0 18 x 2.10 18 x 2.125 Bike Bicycle Tire High Quality: The bike tube is made from premium butyl rubber.It has the advantages of good sealing performance, ozone resistance, aging resistance, shock absorption, electrical insulation Installation Tips: Before installing, put inner tubes into the water, already damage if any bubbles occurred, please contact us in time Feature TR13 straight valves fitted into thickened valve seats for enhanced durability. The pure copper dust caps have built-in rubber seals that keep out dust and water and can be used as a tool to remove the valve core