Bonasil sutures needles are made of high qualitystainless steel. Rational needle shape and silicon layer Technology makes it outstanding sharpness, hard fiber stainless steel material has high bending strength and high ductility. Needle and thread integrated, sewing needle sewing thread Smooth penetration with minimal damage. Non-absorbable sutures Initial tension is 115% of USP standard; Nylon thread: single strand polyamide, inert and stable, smooth thread body, reducing bacterial adhesion; Silk thread: soft thread body, not easy to loosen, not sticking to the mouth, high patient comfort. Absorbable Suture Initial tension is 150% of USP standard, efective tension 7-14 days; Combination of absorbability, adhesion and lubrication, with an absorption cycle of 30 days; The surface is lubricated by a mixture of propylene glycol ester and ethylene glycol ester copolymer.