A one-piece connector and hub sub-unit for attachment to a sample tube receiver is disclosed. The sub-unit includes a first end defining a first piercing member terminating in a blunt end and a second end adapted for receiving a separate piercing member. ...http://www.google.com.au/patents/US20040019344?utm_source=gb-gplus-sharePatent US20040019344 - Integrated, one-piece sampling connector unit
