The VP 180S and the VP 187S are adjustable sliders that allow you to easily adjust the length of the tubing that goes into the well. They are far superior and more flexible then using the shim system described above. Two nylon set screws on each slider allow you to move the slider to any height on the tubes and then lock it into position.
Many of our customers came to us requesting manifolds with different tubing lengths so they could aspirate the wells of microplates without disturbing the pellets of centrifuged cells or other material. As you can see from all the manifolds we sell this was a rapidly growing business, but we would hear complaints that they were too long or too short even though we made them to the customer's specifications. We felt an adjustable slider system would solve this problem and would be a better way to meet this growing demand. The VP 180S and VP 187S give the bench scientists virtually infinite adjustability that can be done in your lab to meet your changing applications. They are designed for 8 and 12 channel manifolds or wands respectively.
The VP 180S and VP 187S are 9 mm tall so when placed on a manifold or wand they will shorten the apparent length of the tubes by 9 mm, so keep this in mind when selecting a manifold or wand. It is best to use these adjustable sliders with the longest tubes for the greatest range of adjustable lengths. The best choices are the eight tube VP 180B with 65 mm long tubes (adjustable between 56 and 0 mm) and the twelve tube VP 187BP-60 with 60 long tubes (adjustable between 51 and 0 mm).