Weldtite 20" x 1.75 - 2.125" Self Sealing Innertube (Schrader): 20X1.75-2.125"

Dr Sludge inner tubes prevent flat tyres, seal punctures instantly up to 3mm in diameter, will work time after time, are water based with anti-corrosion properties that are completely harmless and will not dry out regardless of outside temperatures. Reliable, not sticky, individually tested... in other words, theyre great!