Section 11 Textiles and textiles articles 50 Silk 50 06 Silk yarn and yarn spun from silk waste, put up for retail sale; silkworm gut 50 06 00 Silk yarn and yarn spun from silk waste, put up for retail sale; silkworm gut. Commodity Code Description 50 06 00 00 Silk yarn and yarn spun from silk waste, put up for retail sale; silkworm gut.