Leak-proof protection: Cotton reel storage features a clamshell design for quick and easy access to items, and a leak-proof seal to ensure your cords stay clean. Transparent: Thread holder's clear window finds exactly the coils and spools you want. No more digging through drawers - choose the thread you want quickly and easily. Large capacity: You will get 2 pieces of sewing thread storage, each can hold 42 spools of thread, organize your threads and classify them, prevent them from clumping together, provide ample storage space for your sewing and embroidery threads. Versatile use: The spool holder works with a variety of thread types and sizes and accommodates most standard sewing and embroidery spools. Whether you're a beginner or an experienced crafter, these thread clips are a must-have for your sewing kit. material: Sewing thread storage is made of pp material, which is environmentally friendly, has smooth edges, is sturdy and practical, provides long-lasting protection for your threads, is waterproof and dust-free, and can be easily stored.