SB20 applies only to CRT, LCD and plasma screens larger than four inches measured diagonally. SB50 extended coverage to products refurbished by the manufacturer for retail sale.

• SB20法令只针对带有4英寸以上的阴极射线管、晶、离子的设备，范围为符合上述要求的零售设备。SB50扩大了范围，还涵盖了被制造商整修后用于零售的产品。