Vacancy transfer probabilities from K to L shell were measured using I(K beta)/I(K alpha) intensity ratios for six elements in the atomic region 16 <= Z <= 22. The K X-rays from the targets excited by 5.96 keV (1.85 GBq (55)Fe filtered annular source) incident photon were obtained using a high resolution PGT model Si(Li) detector. Theoretical values were calculated using radiative and radiationless transition rates of these elements. The measured values of eta(KL) were compared with the theoretical ones. Reasonable agreement was typically obtained between present and theoretical values.