Material: plastic; Color: transparent. Suitable for all common household sewing machines. This item consists of 25 cordless sewing machine spools including a sturdy plastic storage box. 25 sewing machine bobbins including plastic storage box to prevent bobbins co.ukom falling out. Convenient storage and transport. A simple design that meets your sewing needs; easy to put on and use; can help you complete a project or quickly sew clothes. Product description Specification: Transparent spools with storage box for easy spool storage. Compatible with most household sewing machines. Easy to install and use. Features: Color: transparent. Material: plastic. Storage box size: 11.7 x 9.6 x 2.5cm. Durable, practical and useful tool for home use. Content: 1x plastic storage box with 25 spools.