Comparison : Item # 8604-22, Inner Replacement, 90º, 29/42 Joint
Item # 8604-24, Inner Replacement, 90º, 34/45 Joint
Item # 8604-26, Inner Replacement, 90º, 40/50 Joint
Item # 8604-28, Inner Replacement, 90º, 45/50 Joint
Item # 8604-30, Inner Replacement, 90º, 50/50 Joint