Strongfort Square 5 lb Dumbbell Weights Hollow Fillable Cast Iron Vintage Pair

These are old and well used, have a nice patina to them (aka rust). The previous owner had taped the grips, I removed it but some residue remains from the adhesive, not bad but could be cleaned up better if desired.

These measure 7 inches long by 3 1/2 inches square on the ends. They do not have a number on them for the weight, but weigh just over 4 pounds each on my postal scale. Not filled all the way!? I am not an expert on vintage weights, but if you have questions please ask and I will do my best to answer.