Villcase 0-9999 Ohm Variable Resistance Box, Simple Decade Resistor Experimental Product Details 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. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.