O-RING, Front of support block seal tube

1007 - 'O' Ring Nitrile Buna Rubber Found in models: ARC140, ARC140EX, ARC150, ARC340, ARC528E, ARC528E-ACD, ARC140-UK Upgrade Kits, ARC145, MK61, MK66, MK73, MK74, PS50PC, GAS-EXT, ARCBEAM(140), ARCBEAM(340)