Link tubing supplied as non-sterile in 30m and 50m lengths in dispenser boxes. Tube extruded with a bubble at every 0.90m interval. Simply cut to required length with scissors at the chosen point to provide Male/Female (M/F) or Female/Female (F/F) connections. Choice of three tube diameters - 5, 6, 7 mm I.D.FeaturesAlso availalble in green 3mm I.D. as oxygen connecting tubingAlso available with a thin anti-static black line to prevent static discharge (also called Conductive Link Tubing)