zipper bag for seed packing certification:CHB,SGS safty for food,easy to open ... and to close airproof,moistureproof Item: zipper bag for seed packingThe author of this information: TONGCHENG TIANBAI PLASTIC CO.,LTDShape ... : rectangle or quadrate with zip lockUsage: Moisture proof, classification, storage, freezing, fresh, for prescription medicine packaging, for hazardous article packaging ...