This version of hand sewing thread is very Fine but tight and durable. Diameter of the Threads: 0.35 mm. A good choice for leather work. Free end sinterable glue. Made from Polyester and waxed with Waterproof Wax, strong and durable. Total Length of the Thread: approx. 300 m. Weight: approx. 35 g. Easily meet the requests of both short sutures and long sutures. Come with a thread spool: 35 mm in diameter and 50 mm in height. Many Colors available. Note: There may be little dust on the surface because of the wax… easy to clean and will effect nothing. We put them into small thick plastic bags to provide you a reliable service.