diff -N StereoPair.java
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ StereoPair.java	24 Jul 2013 22:36:34 -0000	1.1
@@ -0,0 +1,91 @@

+package org.lcsim.hps.recon.tracking;
+
+import org.lcsim.detector.tracker.silicon.SiSensor;
+
+/**
+ * 
+ * @author Per Hansson <[log in to unmask]>
+ * @version $Id: StereoPair.java,v 1.1 2013/07/24 22:36:34 omoreno Exp $ 
+ */
+public class StereoPair {
+
+	
+	// Layer number to which the stereo pair belongs to
+	private int layerNumber = -1; 
+	
+	// The axial and stereo sensors
+	private SiSensor axialSensor = null; 
+	private SiSensor stereoSensor = null;
+
+	/**
+	 * Default Ctor
+	 * 
+	 * @param layerNumber : Layer number to which the stereo pair belongs to
+	 */
+	public StereoPair(int layerNumber){
+		this.layerNumber = layerNumber; 
+	}
+	
+
+	/**
+	 * Set the axial sensor of stereo pair
+	 * 
+	 * @param axialSensor 
+	 */
+	public void setAxialSensor(SiSensor axialSensor){
+		this.axialSensor = axialSensor;
+	}
+	
+	/**
+	 * Set the stereo sensor of the stereo pair
+	 * 
+	 * @param stereoSensor
+	 */
+	public void setStereoSensor(SiSensor stereoSensor){
+		this.stereoSensor = stereoSensor; 
+	}
+	
+	/**
+	 * Get the axial sensor of the stereo pair
+	 * 
+	 * @return Axial sensor. Returns null if it hasn't been set yet.
+	 */
+	public SiSensor getAxialSensor(){
+		return axialSensor; 
+	}
+	
+	/**
+	 * Get the stereo sensor of the stereo pair
+	 * 
+	 * @return Stereo sensor. Returns null if it hasn't been set yet.
+	 */
+	public SiSensor getStereoSensor(){
+		return stereoSensor; 
+	}
+
+	/**
+	 * Get the layer number to which the stereo pair belongs to
+	 * 
+	 * @return layer number
+	 */
+	public int getLayerNumber(){
+		return layerNumber; 
+	}
+	
+	/**
+	 * Return a string describing the stereo pair
+	 * 
+	 * @return stereo pair description
+	 */
+	@Override
+	public String toString(){
+		String axialName = axialSensor == null ? "None" : axialSensor.getName();
+		String stereoName = stereoSensor == null ? "None" : stereoSensor.getName();
+		String description = "Stereo Pair:\n";
+		description += "\tLayer Number: " + this.getLayerNumber();
+		description += "\t\tAxial Sensor: " + axialName;
+		description += "\t\tStereo Sensor: " + stereoName;
+		return description; 
+		
+	}
+}