English: What is a quality/treatment mark? For both heat treatment (HT) and methyl bromide (MB) fumigation programs , the quality/treatment Mark consists of the a) agency trademark which is the identifying symbol, logo or name of the accredited agency, b) the Facility Identification which is the WPM product manufacturer name, brand or assigned facility number, c) the HT or MB mark, d) the country code which is the two letter ISO country abbreviation, e) the IPPC Approved international symbol for compliant wood packaging material and f) DUN when indication is used for dunnage.