AMS - Model 61451 -Gas Powered Upper Extension

Gas Powered Upper Extensions have knurl marks located on the female end. To create a 4' sampler, you WILL need to connect an upper and lower tube together. Upon assembly, you will notice two parallel knurl marks on each sampler tube. Properly connecting your tubes with these knurl marks in the correct position will ensure the proper timing of your sample liner so that there is minimal liner float inside the sampler.