We offer a wide range of high quality Double Thread Sewing Heads. These are fabricated using quality raw materials, guaranteeing the product's durability and long lifespan. The product is capable of sewing materials with thicknesses of up to to 15mm, making these ideal for use on heavy and thick materials. The RC-4S Series that we offer, can stitch on all types of bag materials; also, the oil reservoir provides continuous lubrication to the moving parts inside the machine. The product is priced reasonably and is shipped promptly.