This is a 0.021inch reinforced hydrophilic microcatheter. The proximal shaft is stiff with a more flexible distal part. The tip of the catheter is steam shapeable. The cathater takes a 0.018 inch wire.

These are claimed to have good pushability and trackability. They have a nitinol braded design with varying degrees of flexibility along the shaft. They have either a 45 degree or 90 degree tip angle and are said to have a relativey large internal diameter. They accept a 0.014 inch guidewire...

Cook Medical's Cantata Microcatheteris used in small vessel or superselective anatomy for diagnostic and interventional procedures, including peripheral and coronary use. The device is now available in a 2.9 Fr size that has a high-flow, .027 inch inner diameter (ID) and is designed for access...

According to the manufacturer, the Corsair is a hybrid catheter designed for crossing tortuous microchannels and easing the approach to complex lesions.  We have found it useful due to its tapered tip which helps to cross CTOs.