A neonatal intravascular device having an extension tube to relief stress between a catheter adapter and a luer adapter of the catheter assembly. A novel toner for the development of an electrostatic image is provided comprising an agglomerate of particles containing at least primary polymer particles, wherein said primary polymer particles substantially comprise a wax encapsulated therein. Each of the pair of mounting brackets includes a support surface defining a top portion and a bottom portion, a front side surface and a rear side surface. Independent follower pins 60, 61 are provided on the female housing 41 and the cover 42.