This is a set of two stretch yarns. Nikke Victor Wool Stretch Color: ・Red Material: ・Nylon 87% ・Polyurethane 13% Cone Size: Height: Approximately 12cm x Diameter: Approximately 3.5cm Kintenma Amikomi Stretch Yarn Color: ・Natural Material: ・Nylon 87% ・Operon 13% Tube Size: Length: 6.5cm x Diameter: 1.2cm Features: ● Simply knit together with the main yarn for a perfect fit without sagging. ● The innovative case is very convenient for both machine knitting and hand knitting. ● Please use your ideas for ribbing and patterned weaving. How to Use: ● Secure the hole in the case with a needle or weight, pull out the yarn, and knit it together with the main yarn while pulling it taut. Each was used for the ribbing of the waist and cuffs of a sweater (enough for one sweater). The remaining length is unknown. You can maintain elasticity by using it for the ribbing of the opening of socks knitted with the popular sock yarn, or for the neck, cuffs, and waist of clothing. Because it is a very fine yarn, you can use it with yarn of a similar color even if it's not exactly the same color, and it won't be noticeable. It will be placed in a plastic bag for waterproofing and shipped via anonymous Mercari delivery. Please feel free to send a message if you have any questions. Thank you.