dear Mr >From a internet's introduction, we know that your company can provide the "XeF2" material, which are used in "F-filming" on Rubber Stopper. Would you please provide information about the "XeF2" used in F-filming on Rubber Stopper as for us reference: 1.XeF2's usage; 2.price 3.sample with the weight of 50g (address: Yichang Municipal Economic & Trande Commission Department, Tao Hua Ling ,Yichang , Hubei, China Mr. Cheng Ji-yong Postcard: 443000) fax:07176332775 tel:0717-8604505 13956326696 e-mail:jgjqjy@yesky.com cjymail2000@sina.com) Thanks"