The heavy (12 pounds) metal sleeve that moves up and down while pounding the sampling tube into the ground. Fits both the JMC Environmentalist's Sub-Soil Probe and the JMC Environmentalist's Sub-Soil Probe PLUS.
Aluminum Washer fits manual sliding hammer for the JMC Environmentalist's Sub-Soil Probe (0.8 inch diameter sampler). Fits between the Threaded Collar(PN163) and the Aluminum Cylinder(PN161). This is the part that rests on the top of the sampling tube.