Reviews 20cm Ruler

2 Pieces ECG EKG Calipers with Sleeves ECG Caliper Measuring Tools EKG Calipers Ruler Drafting Cardiology Calipers Dividers, Pink

Ekg caliper measuring tool set: you will get 2 copper ekg calipers with a scale independent coat in 2 different colors, namely black and blue, and 2 transparent ECG rulers, which can be applied to measure ECG waveform.
The copper ekg caliper pen has a plastic clip that can be easily fixed to the nursing uniform.
Adjustable and convenient: EKG calipers nursing has a total length of 4.13 inch/ 11.5 cm, which is convenient to carry in the pocket.
The needle tip is fixed with screws, and the length of the 2 needles can be adjusted.
The 2 corners are fixed with screws outside, which is convenient to adjust the tightness of the 2 corners.
The plastic protective cover is a 2.4 inch/ 6 cm ruler, which is convenient for reference.
Lightweight and portable: EKG ruler measures approx. 7.87 inches/ 20 cm in length, which can be suitable for rapid basic ECG measurement on the paper and screen of patient monitor defibrillator.
Also suitable for routine use and emergency services.
It has the advantages of light weight and small volume.
Reliable and reusable: the transparent ECG ruler is made of large-scale transparent plastic, which is reliable and has a protective sleeve for longer service life.
The 2 legs of the ECG calipers for nurses are made of copper, which is r....

Nice Combination: you will get 30 pieces of plastic rulers and 30 pieces of plastic protractors, adequate enough to share with kids.
Light and easy to carry, they will not take up too much space.
Safe and Quality: both straight ruler and math protractor are made of quality plastic, safe and sturdy, not easy to break.
Remember not to put too much force on the ruler and protractor, thus you can apply for a long time.
Clear Size: with 0 to 180 degree measuring angle range, the bottom of the protractors classroom set is an accurate 6 inch ruler, and the minimum accuracy of the angle is 1 degree.
Also, there is a clear line to distinguish every 10 degrees.
The flexible ruler is about 30.6 x 3 cm/ 12 x 1.2 inches, the thickness is 0.25 cm/ 0.1 inches, and the measuring range is about 30 cm/ 12 inches.
Printed with inches and centimeter marks, this ruler makes the measurement more convenient.
Transparent Color: simple colors make numbers and letters clearly visible.
With a clear plastic ruler, you can measure an object easily and quickly.
Versatile Application: our half circle protractors and 12 inch ruler with centimeters are suitable for students, teachers, designers, architects and engineers, also can be widely applied for drawing, drafting, graphing and mak....

Dimension of the Cover: 9.44*7.36*1.1 inches (24*18.7*2.8CM) (L * W * H).
Dimension of the Refill Pages: 8.3*5.5 inches (21 * 14CM) (L*W).
Material: High Quality Artificial PU Leather and Paper.
Style: A5 Size with 6 Rings (Inside diameter: 20mm) Distance between holes:2cm/2cm/7cm/2cm/2cm.
Product Accessorries Includes: 1 * Cover.
Refill Pages (8.3*5.5 inches) (21 * 14CM) Includes: Calendar (2022-2023).

... 50.2cm x 36.8cm x 6cm/20'' x 14.5'' x 2.4''.
T-SQUARE AND TRIANGLE: The T-square straightedge slides up and down on a plastic runner,and maintains a nice 90° angle and can be locked into position on both sides of the board.With 12cm rotating ruler and 12cm triangle with angle attachment slide in a groove on the T-square, making it very easy to move back and forth..
PAPER LOCATOR AND TILT ANGLE FEET: There are paper clips on both sides of the board and with scale clamp on the bottom, to make the drawing process more accurate and stable. You can also attached the anti slip support legs to the back of the the board, find a comfortable drawing angle..
APPLICABLE OCCASIONS:This drawing board is an indispensable tool for engineers, designers and engineering students, and also a perfect gift to your friends..
PACKAGE LIST: Set Square, 2x Clamps, 1x Protractor, 2 Anti Slip Support Legs, 1x Sliding Ruler, 1x drawing pencil and lead core, all parts in picture included! It will be a great Christmas gift for engineering students and people who draws a picture me....

Size: This circle template is 9.96 inches (25.3 cm) long, 5.08 inches (12.9 cm) wide and weighs 0.97 oz (27.6 grams)..
Material: This circle ruler adopted K Resin as it’s material. This makes our ruler highly transparent, not easy to break, and more durable..
36 Circles: You could find 36 different circles on this circle ruler while they are in different diameters from 1mm to 36 mm. It would helps you to draw or measure different circles easier and quicker..
Round Corners: This circle drawing ruler adopted round corner design instead of sharp corner. This small change makes our ruler more secure. You don't have to worry about getting scratched by sharp ruler corners. It is also suitable to be used in schools..
Wide Applications: It is widely used for office and school. Such as for proper flange size measurements for a breast pump, drawing nice circles and lines in fabric artwork, creating crafts, etc..

4 Pieces math set: 4 in 1 geometry tool contains a 6 inch/ 15 cm straight ruler, a 4 inch protractor, 2 x triangle ruler (45 and 60 degree).
2 Sides measurement ruler: transparent ruler and through it you can read conveniently.
straight and triangle rulers with inch and metric scales on them.
Portable and durable: geometry tools are constructed of plastic material, lightweight, easy and handy to be put into your school bags or in your desk.
Easy to measure angle: 4 inch/ 10 cm 180 degree protractor, 45 and 60 degree set rulers make it convenient to get the angles' degrees.
Wide application: math geometry tool set are useful tools for architects, engineers, artists, designers, students, teacher and so on.

45 degree ruler measurement: 12cm and 18cm，30/60 degree ruler measurement: 11cm and 18cm..
Great drawing tool for school or office..