Qosina offers a variety of valves and tuohy borst adapters that are in stock and ready for immediate delivery. Made with a red flat cap, Qosina part #11221 is a tuohy borst adapter with a clear polycarbonate body designed to prevent the backflow of fluid around instruments that are 7 FR - 17 FR. With a threaded flare connector and female luer lock sideport for flushing, this large bore tuohy is ideal for applications which require the use of large instruments or devices. Qosina has a wide selection of large bore tuohy borst adapters to meet your project requirements.