Catheter Access Ports Smooth barb safely "locks" with the catheter to eliminate disconnections Unique shape designed for secure external suturing Quick, clean access to catheters via a closed split septum Packaged 2 per sterile pouch, quantities as low as 20 units 22ga port is the perfect size for rats, hamsters and guinea pigs 25ga port is the perfect size for mice and CannuLock tether lines Choose from a 22ga or 25ga catheter connection to fit multiple vascular access catheters in mice, rats, hamsters and guinea pigs.