Villcase Variable Resistance Box 0-9999 Ohm, Simple Adjustable Resistor Decade Product Features Plastic ?Resistor Box: Simple design: The resistance box is simple in structure, easy to use, and simple in design, allowing you to use it with confidence. Our variable resistance box is light and reliable, portable and practical, suitable for school use. ?Variable Box 0-9999 Ohm: Variable Resistance Box Great instrument for learning physical and electrical experiments, easy to operate. ?Adjustable Resistance Box: a selection of professional variable resistance box, which has good stability and high accuracy. ?Experiment Resistor Substitution Box: Decade Resistor Experimental Equipment Made plastic material, safe and durable, which could be for very time. ?Resistance Box Electrical: Application: suitable for school teaching, physics classroom teaching, physics experiments, research and other uses. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!