A black surgical mask that belonged to King of Pop Michael Jackson, has been putup for auction. The Thriller hitmaker allegedly wore the mask during his This Is It concert tour rehearsalon June 24, 2009, which turned out to be his last. According to auction house Nate D Sanders Auctions,Jackson personally designed the mask and it has visible traces of his stage make-up along with a strandof his black hair, reported TMZ. One of the late singers ex minders was in possession of the mask. Themask made of silk fabric is expected to fetch USD 50,000-USD 150,000.