... Dongguan Kaoka Hardware & Plastic Co.,Ltd provide various injection productAll kinds of plastic injection products used ... PP,PE, Metal Parts and so on. Its seal products are widely used in Auto, Environmental, Sanitary, ... -Condition (R134A, R12, R22 media), Hydraulic, Engineer Machine, Textile ect . Our Company is committed to providing ... our company . 12 years exprience for various injection product