Concise ruler 28N English Version Circular slide rule made in Japan *US seller For Sale

・English specifications for “Slide Rule No. 27N”
・This is the most popular circular slide rule, and it is a basic slide rule that can easily perform calculations other than addition and subtraction, such as multiplication, division, squaring, and cubing, so it is used in all fields.
・Types of calculations: General multiplication and division, proportionality (exponential percentages), squares, and cubes
・Back side: Unit conversions for length, area, volume, mass, temperature, pressure, speed, etc.
・Scale: D, C, CI, A, K (surface)
・Comes with a dedicated storage case and instruction manual.

1. The products listed on this site are sold at the same time on other websites, and we will check the inventory after your order is placed. In such cases, we will contact you to cancel your order.

1. We accept managed payment.
2. After 3 days, unpaid case will be opened. So please contact us in advance if your payment delayed.

1. We usually ship within 3 business days of receiving cleared payment.
2. I send a product by DHL/FedEx/Japan Post.
3. Shipping is only available to the address registered on . Please note that any address not registered on is not acceptable to ship.

1. Please kindly contact us before returning the error items.
2. The purchased items need to be returned in unused condition with original packing or damaged caused by shipping or product error, within 30 days of receipt.

Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer\'s responsibility. Please check with your country\'s customs office to determine what these additional costs will be prior to offerding or buying.

Thank you for your understanding.