Plastic EKG ruler with standard intervals features charts and black scales. 1-5/8 in." H x 6-3/4 in. W. For instructional use only. Not for human or animal use.
Description
Plastic EKG ruler with standard intervals features charts and black scales. 1-5/8 in." H x 6-3/4 in. W. For instructional use only. Not for human or animal use.
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