The Customer Service Department is available Monday through Friday, 10:00am to 6:00pm EST. For immediate concerns or assistance please call the Customer Service Department to speak with a representative directly. We are here to help and can be reached by phone, email or through Live Chat. Live Chat is a helpful tool for discussing the product and asking general questions, but remember, a Customer Service Representative is only available to chat Monday through Friday, 8:00am to 5:00pm PST. Emailing [email protected] is a great way to seek out assistance. You will receive a timely response from a representative ready to help!

Grenco Science prides itself on offering the highest quality products and customer service available. As much as the company would like to help the victims of counterfeiting, we're not able to provide assistance for those who have purchased one of these inauthentic items.

All Grenco Science, electronics (battery + charger) are automatically covered under a one-year Warranty. This is a service that Grenco Science provides for all of its customers. One does not need to purchase anything in order to receive this feature. If you are having trouble with either your G Pen Battery or G Pen Charger, please contact the customer service department either by email or phone. The staff is available Monday through Friday from 9:00am to 5:00pm, Pacific Standard Time. Please keep in mind, a warranty system is one that requires a copy of a receipt or proof of purchase. We are always happy to provide assistance, even to those without this documentation, but providing a receipt enables a Customer Service representative to help in a more efficient way. Without the receipt one will be subjected to a nominal fee in regard to warranty replacements. Unused tanks can be returned for store credit within the 7-day period after ship date.

Same-day shipping, on orders submitted before 12pm Central Time Mon-Fri. The customer may choose between different shipping methods based on how quickly they prefer the package be delivered. We feature UPS and USPS as our primary courier services. All delivery times presented at checkout are estimates provided by the couriers and are not guaranteed. Keep in mind that all orders placed during non-business hours, including weekends, evenings and holidays, will not be processed until regular business hours have resumed. Our shipping cut-off time is 2:30 PM EST.