Used for placement of .035 inch or .038 inch diameter wire guides into the vascular system when a small 21 gage needlestick is desired. Includes 21 gage, 4 cm EchoTip needle and a 7 cm introducer designed to increase control for retrograde infrapopliteal access. Check-Flo hemostasis valve attaches directly to the Micropuncture introducer, for use as an interventional introducer with a 2.9 Fr inner diameter.