section 132 which is configured for attachment to the proximal coupling section 126 of the boot 120 to provide a securing connection thereto the coupling section 132 includes a pair of stems 137 139 which are shaped and sized to fit tightly within lumens 112 114 of catheter 110 to provide a fluid tight connection between the boot 120 and the bifurcation assembly 130 in one embodiment the stems are made of metal although certainly other non metal materials are also possible immediately surrounding the stems 137 139 is a hood 138 which is configured and shaped to tightly receive proximal coupling section 126 of the boot 120 surrounding both stems 137 139 and hood 138 is a cover 133 which abuts a shoulder 125 at the proximal end 121 of the main body portion 122 upon assembly and has a diameter approximately the same as the diameter thereof the stems 137 139 extend beyond the cover 133 to enable initial engagement with the catheter lumens 112 114 prior to the remainder of the coupling section 132 coming into contact with the proximal coupling section 126 the bifurcation assembly 130 is assembled onto the boot 120 by sliding the stems 137 139 into the respective lumens 112 114 of the catheter 110 while providing pressure to the boot 120 to ensure a stationary position to facilitate this insertion process and prevent damage to the catheter round nosed obturators which are described in more detail below may be utilized as the stems 137 139 are received into the lumens 112.