ADI'S BALL-IN-THE-WALL® & BALL-IN-TUBE (TM) makes it simple for you to see if your room is at its proper directional minimum room pressure. Design includes a failsafe feature! Easy to install, no electricity & comes with lifetime replacement warranty!
Elm Hill Labs has been specializing in the production of guinea pigs exclusively for the research community for over 50 years. All Elm Hill Hartley Guinea Pigs and Multicolored Guinea pigs are Virus-Antibody-Free.read more