Medical devices in the nature of administration sets, extension sets, primary IV sets, secondary IV sets, anesthesia sets, filter extension sets, custom sets, huber needle sets and IV start and dressing change kits, all comprised of combinations of the following elements, namely, medical connectors and component parts thereof, stopcocks, check valves, medical tubing, hypodermic needles, enteral valves, adapters, antisiphon valves, y-sites, pump cassettes, burrette chambers, connectors, tubing caps, needleless connectors, caps for connectors, fluid filters, tubing clamps, IV bag spikes, drip chambers, luers, luer slips, luer locks, back check valves, roller clamps, filters, spin locks; Medical devices, namely, medical connectors and component parts thereof, stopcocks, check valves, medical tubing, hypodermic needles, enteral valves, adapters, anti-siphon valves, y-sites, pump cassettes, burrette chambers, connectors, tubing caps, needleless connectors, caps for connectors, fluid filters, tubing clamps, IV bag spikes, drip chambers, luers, luer slips, luer locks, back check valves, roller clamps, filters, spin locks, all used individually or in combination as component parts of administration sets, extension sets, primary IV sets, secondary IV sets, anesthesia sets, filter extension sets, custom sets, huber needle sets and IV start and dressing change kits