50050011

YRN SPN FRM SLK WST OTHR THN NOIL SLK CONTNG >=85% BY WT OF SLK WST.

50050012

YRN SPN FRM NOIL SLK CONTNG >=85% BY WT OF SLK WST.

50050021

YRN SPN FRM SLK WST OTHR THN NOIL SLK CONTNG <85% BY WT OF SLK

50050022

YRN SPN FRM NOIL SLK CONTNG <85% BY WT OF SILK