Park tool vulcanising patch kit vp 1the vp 1 patch kit includes six thin and flexible patches with tapered edges to blend with the tubes profile each kit is packaged in a small plastic box with sandpaper for cleaning the tube and instructions featuresfour round patches for smaller holestwo oval patches for wider cutsself vulcanizing fluid bonds the patch to the tube at the molecular levelbuypark tool repair kitsfrom chain reaction cycles the worlds largest online bike store