Recently, the company looking for a house waterproof building materials are placed inside the ceiling, called linoleum paper (linen paper), also known as asphalt paper, English called Felt or Tar paper Alibaba can be found at present I want to find specifications and models are D-4869 1 * 20 meters but Alibaba is basically 17 to 18 kg but there are 5 to 7 kg of the situation, what is this situation?
Can find the manufacturers, you call them directly to ask not better
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