Sensibles Universal Sensor Holder - Econo Starter Kit Contains: 2 Sensible Bite Blocks, 1 Each Large And Medium Size 1 Each Anterior/Posterior Aiming Rings 1 Each Anterior/Posterior Positioning Bars 25 Comfee Sensor Sleeves Sensibles change on-the-fly with a simple push of a button and a quick reposition of the sensor. It's that fast and easy! Medium holds most size 2 and size 0 sensors. Large holds really big sensors.
