Side Grinding Panel 6x8" for 4 or 6 Panel Hub

6" pipe: use with Hub 6" (1001240150A). 6" & 8" pipes: use with Hub 6-8" 6 panel (1001250150A). 8-9" pipes: use with Hub 8-9" - 8 panel (1021800200). Sold in packages of 12 panels.