adapter housing / extension housing
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722.666, 722.667, 722.668, 722.669, 722.670,
722.671, 722.672, 722.673, 722.674, 722.675,
722.676, 722.677, 722.689, 722.690, 722.694,
722.695, 722.699
Picture no. on Exploded View770