MEC Rubber Grommet 304G fits under the powder & shot bottles, 1 per package.
This part is absolutely essential for a tight seal around the charge bar. Keep an extra one around, because you'll need it eventually.
If your powder drops are inconsistent, then you could be creating dangerous loads. That's why you need to routinely check your powder drops with a reliable scale. Also, you need to check this part to make sure it isn't worn. Replace it immediately if it looks the least bit worn.
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to – www.P65Warnings.ca.gov.