Caption: Differential K0 production cross section versus produced kaon momentum. These data are used in a fit to a Sanford-Wang type parameterization which is shown by the various lines in the plot. This parameterization along with its uncertainties are used in the MiniBooNE oscillation analysis. The MiniBooNE electron neutrino background from K0 decay is mostly sensitive to production near PK =2.75 GeV and υ = 0.030 where this fit constrains the cross section to about 25%.