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.
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.