Features: The EKG 7 Step Ruler is essential tool for enhancing their EKG interpretation skills, offering structured approach to reading heart rhythms effectively. Crafted from pp and designed in convenient identity card size, this portable pocket EKG card ruler, ensuring long time use and easy storage. Very suitable for students, healthcare professional, and fitness enthusiasts, this EKG reference guide supports those who need quickly access to EKG analysis tool. Widely used for educational settings, clinical environment, or even at home, the EKG 7 Step Ruler aids in understanding heart health during routine checks or emergency assessments. Enhancing your cardiovascular knowledge and confidence with this practical EKG assessment tool, making it addition to any healthcare toolkit or health management plan. Specifications: Color: Clear Component: PP Size: Approx. 8.6x5.4cm/3.38x2.13in Weight: Approx. 20g Package Includes: 1Piece EKG 7 Step Ruler Card note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color