Serena and Venus Williams are famed not just for being brilliant tennis players but for also having a certain love of bling. Therefore it's not a surprise that their new limited Wilson K Factor tennis rackets have a golden touch from gold leaf When they play at Wimbledon this year they will be using the K Factor gold rackets. Serena will play with a pure black racket and Venus with a pure white version both with 22 carat gold leaf laid into the frame. 650 of each model of the K Factor gold limited edition rackets will be available worldwide for sale to the public this summer for $500 each. Venus and Serena will also each autograph and donate 10 K Factor gold limited edition rackets for auction by The Breast Cancer Research Foundation.