DWK Wheaton 9 mm ScrewTin with metal O-ring, screw caps, natural, with precut PTFE/silicone septum, screw thread, 100 pc/PAK

Please note that this product is "made to order". Therefore an order cannot be canceled or returned even if delivery times are longer! ScrewTin™ Caps have a ring which is a metallic disc for x-y-z robotics that employ magnetic capture to move vials. Where noted caps are Post Baked to remove additional siloxanes