Aluminum Crimp Caps with PTFE/Silicone Septum MOQ: 50 packs, 100pcs/pack; Aluminum Caps for 11mm 2ml or 20mm Crimp Neck Vials Use Together with PTFE/Silicone Septa or Rubber Stopper Color: Metal Silver PTFE/Silicone Septum Septum Size: 11*1mm; 20*3mm Phone/Whatsapp/Wechat: +8618057059138 Send Inquiry Wholesale Price Autosampler Vials