Attention: Please choose the correct replacement size before purchase. M6 thread is a common size for furniture feet which is Made in China.1/4"-20 UNC thread fits most of Made in USA furniture feet. Read the Size Picture can help you determine a suitable size. Size: 1/4"-20 UNC thread, it's a common size for most of Made in USA furniture feet. Thread shaft is 0.71"(18mm) long. Material: Threaded studs are made from galvanized steel with black PP non-skid base. Each package contains 24pcs leveling foot adjuster and 24pcs T-Nuts. Easy to install, our material is the best material for heavy-duty use, very simple and fast to complete the installation out of balance. Suitable for all furniture, no need to buy a new table or chair from the store, you can use our horizontal mat to update the furniture at home. The leveling feet will reduce friction and noise while making your furniture easier to move. It is the best method for all types of furniture levels in homes, offices, schools, restaurants. Table leveling has a wide range of uses, not limited to furniture. Our furniture feet can be used for any application you want to balance, from garage tables to garden benches.