Dongguan Merin Industry Co., Ltd. is an integrated manufacturer of industry and trade specializing in Sintered Slit Vent. A professional enterprise specializing in the production, sales and service of Sintered Vent. The sintered vent are developed for for aluminum alloy, copper, tin and other non-ferrous metals and alloy casting molds's exhausting . They have High Venting Efficiency, High Casting Productivity,easy replacement, and Long Durability. Widely used for gravity casting, low pressure casting and plastic molding.