Screwcap with O-ring, Yellow "139-201Y" (500 pieces)

Made of polypropylene, autoclavable, with built-in silicone rubber O-ring Material: Virgin Polypropylene（cap)Silicone Rubber （O- ring）   Resistant to the pressure and freezeO- ring made of silicone rubber is resistant to the pressure and is suitable for storage in liquid nitrogen (vapor phase) or the deep freezer.   6 Colors Natural: 139-201C Blue: 139-201B Green: 139-201G Red: 139-201R Yellow: 139-201Y Black: 139-201BL   Nuclease-free guaranteedThis mark shows RNase/DNase/Human-DNA free. Products with this mark are manufactured in the clean room under our high quality control, and inspected to meet our strict quality standards. A document with this mark can be issued for each lot upon your request.   *Please loosen the cap and autoclave.   【Precautions: Handling Screwcap Tubes under the Liquid Nitrogen】1. In terms of safety, store the screwcap tubes in the vapor phase.2. To avoid any risks such as the tube rupture and the sample spatter, do Not handle the screwcap tube under the l