... study customer's drawing or original sample, we study it's material, hardness, color, material density, dimensions, ... vulcanization. After vulcanization is done, we cool it and wash it. Sometimes, to remove the unpleasant odor, we ... we have to make is that we don't accept Paypal, some customers can't understand this, we ... they must use it too often when they buy goods from ebay, but Paypal is too costly ...