Patent ID: 7141068

Claim:
A spinal spacer tube assembly comprising: (a) a spacer tube that is open at each end, said tube comprising: (i) a side wall including a plurality of openings therethrough; (ii) a first longitudinal internal rib within the spacer tube, said rib including a pair of first rib sides and a pair of first rib ends; (iii) a second longitudinal internal rib within the spacer tube, said rib including a pair of second rib sides and a pair of second rib ends; (b) a pair of end caps, each of which comprises: (i) a pair of spaced support posts having a support surface therebetween, said pair of support posts being adapted to be placed over a first internal rib within the spacer tube so that the support posts are adjacent to the first rib sides and the support surface engages a first rib end in a load bearing relationship; (ii) a pair of friction prongs that are adapted to engage the second rib sides of a second internal rib; wherein at least one of the end caps includes a plurality of serrations that extend beyond the end of the spinal spacer tube when the end cap is installed thereon.