Comparison : Item # 820, PLF1-2-1-6HF-V-E1-S-C-E1-10-V-0-7-1 (without element)
Item # 821, PLF1-2-2-6HF-V-E1-S-C-E1-10-V-0-7-1 (without element)
Item # 822, PLF1-1-1-9HF-V-E1-S-C-E1-10-V-0-7-1 (without element)
Item # 823, PLF1-2-2-9HF-V-E1-S-C-E1-10-V-0-7-1 (without element)