Holiday Return/Exchange Policy: For customers who purchase between now to December 25th, we will automatically extend the return/exchange date to January 31st. No restocking fee, no question ask, hassle free return. ATC Economy Glycol Antifreeze/Battery/Cleaning Fluids Refractometer Tester RHA-100ATC We offer 4 years warranty for this tools, no other sellers offer this warranty. If anything goes wrong, we will simply send you a brand new one! RHA-100ATC Scale Ranges: Propylene Glycol: 32F to –60F (5F Intervals Accuracy) - WITH CONCENTRATION OF GLYCOL % Ethylene Glycol:, 32F to –84F (5F Intervals Accuracy) - WITH CONCENTRATION OF GLYCOL % Battery Fluid Specific Gravity: 1.100 to 1.400 with “Recharge”, “Fair” and “Good” Ranges (0.050 Intervals) The scale is MUCH clearer than this scale depicts below! What does it do ? It will tell you the freeze point of your ethylene or propylene glycol antifreeze! It will tell you the concentration of ethylene or propylene glycol antifreeze in water by percentage! It will tell you the condition of your battery by measuring the Battery Acids Specific Gravity - the weaker the acid SG, the weaker the battery strength! Automatic Temperature Compensation (ATC) Traditional version: Using screw driver for calibration Sturdy and light weighted Aluminum body Item size: approx. 150 (L) x 29 (W) x 29 (D) mm (5.91 x 1.14 x 1.14 inch) Item weight: approx. 140 g (4.94 oz) comes with pipette, screw driver, case and instruction. If you prefer to C, our model ATC Glycol Antifreeze/Batt?ery/Cleaning Fluid Refractometer Tester RHA-503ATC is recommended Payments are accepted through Paypal. We ship through USPS Priority Mail, it usually arrives in 3 business days. International: We charge the same shipping cost to all our customers worldwide. Our default shipping is United State Postal Service First Class mail, it take 5-10 business days for delivery. we also offer Express Mail which only take 3-6 days. Handing time: 1 business day. We promise our best quality and the lowest price for our customers, if the item is not as the same as the description in the listing page, we will issue a exchange or full refund. if the item is the same as the description, we will charge a 15% restocking fee. Our goal is to place a profit margin of $1 ~ $3 per item and sell in volume. As such, the more you save the more we make. While the others are selling 1 item, we are selling 10 ~ 20 items due to our price reduction. Visit us at www.opticSfactory.com Please use the "Ask Seller A Question" button. Please allow up to 24 hours for a response. Usually the buyer will get response in 6 hours.