Lower cost and price points, Glide forward shield, Pull back tubing. Color coding for easy gauge identification. Ultra-sharp needle for comfort. High Fill Rate. Thin-Wall Technology, lubricated cannula needles All 50/bx #5040H-25gx3/4 #5042H-23gx3/4 #5044H-21gx3/4 Latex Free UNSPSC#41104130