Enviro-Safe Stop Leak for R12 Systems case of 12 #2030-R12 Description Enviro-Safe Stop Leak for R12 systems Part#: 2030-R12 Case of 12 With age, o rings and seals will shrink and deteriorate. When Enviro-Safe Stop Leak is added to your a/c system, it reconditions the rubber o rings and seals. 1 can will treat 1 vehicle. Installing Enviro-Safe Stop Leak may stop the yearly recharge of lost refrigerant. The top of the can has a R134a top. Hoses and taps available in R134a and R12 to help you with installation. Payment Shipping Returns Payment is required at the time of purchase through payments. We ship Monday-Friday 8am-4pm. We try our best to get every order shipped the same day. We ship with Fedex Ground, UPS Ground, USPS First Class and USPS Priority. If you need faster shipping, we are able to ship certain items via air. Of course, that cost is much higher and you would need to call for a shipping quote. We do combine shipping whenever possible. A tracking number will be provided at the time of shipment. Dates we are closed that would affect handling times: New Years Eve, New Years Day, Good Friday, Memorial Day, July 4th, Labor Day, Thanksgiving, Black Friday, Christmas Eve and Christmas Day. These days will extend our handling time by 1 or 2 days. Please keep in mind that we have ZERO control over USPS/Fedex/UPS and their timeliness in delivering your package! Please don't leave negative feedback for something that is beyond our control. Buyer has 30 days to contact Enviro-Safe regarding any issues or to request a return. The item will be replaced or the buyers money refunded AFTER Enviro-Safe receives the item back in the same condition that is was shipped. If the buyer requests the return and there is nothing wrong with the item, the buyer is responsible for the return shipping and will not be refunded for the original shipping. If the item is defective, Enviro-Safe will supply a label for return and will refund or replace in full. Note: hazmat shipments can not be returned. (description exceeds maximum possible length)