These products are the sewing machine spool pin caps. They are made of plastic material, which is durable for you to use for a long time. One package comes with enough quantity for you to use. Features -Color:White -Material:Plastic -Size: About4.45X4.45X1.60cm/1.75X1.75X0.63in -Note:Compatible for Singer51113-456 series sewing machine - These products are made of plastic material, which is light weight and easy for you to store. - These products are designed for the sewing machine to make sure the thread at the right place. - They are the must have parts of the sewing, which can ensure the effectivity of your work. - They have fine workmanship and reasonable price, you can buy them at a affordable price. - These spool pin caps are made of premium material, not easy to break or deform, durable to serve you for long time. Package list: 4 x Sewing Machine Accessories