... printing is available 4. Material: PVC Item name: ECG cliper/Heart Rate ruler, medical ruler, promotional ruler, promotional giftsMaterial: PVC Size: ... 163*130MMFunction: used to measure Heart Rate, Wave Amplitude, P-R, QRS, Q-T intervalsMOQ: 6, ... G.W.:7.8KG N.W.:6.8 KGSsample time:7 daysProduction lead time:20 days.customers' designs and logos are welcome. ...