I want to buy rubber butyl tape, double sided, water resistant, anti-heat and cool for following sizes?1/8"x3/4"x50', 40' container load every month for black color, and 20' container load every the other month for white color.Please quote me FOB Qingdao port.Thank you very much for your help.Fran ZhangHCL USA Inc.847-924-2437