Comparison : Item # 83021334, Ohaus 220 Gram (g) Capacity Explorer NTEP Analytical Balance
Item # 30061998, Ohaus 220 Gram (g) Capacity Standard Automatic Door Explorer NTEP Analytical Balance
Item # 83021337, Ohaus 320 Gram (g) Capacity Explorer NTEP Analytical Balance
Item # 30061999, Ohaus 320 Gram (g) Capacity Standard Automatic Door Explorer NTEP Analytical Balance