New Delhi, Feb 9 :     Indian Shaving Products Ltd (ISPL), a subsidiary of the $ 10-billion Boston-based multinational Gillette, has approved the merger of two of its siblings Duracell (India) Pvt Ltd (DIPL) and Wilkinson Sword India Ltd (WSIL) with itself. The ISPL board met today to clear the merger and the swap ratio has been fixed at one share of ISPL for every 13 shares of DIPL and 9 shares of WSIL. The merger will be effective from January 1 this year. Indian Shaving Products manufactures a wide range of shaving products, including the premier 7 O'clock brand. The company also entered into a long term licence agreement with Gillette to sell its products in the Indian market. Last year, following import relaxations, the company launched the entire Gillette series of products comprising shave gel, shave foam, after-shave lotion, conditioners and deodorants. It also distributes Oral-B oral care products, Braun small electrical appliances and select writing instruments. DIPL is engaged in the business of manufacture and sale of Duracell alkaline batteries. WSIL is engaged in the manufacture and sale of Wilkinson Sword blades and razors, Geep batteries and torches and distribution of Duracell alkaline batteries.