- All
- Deals
- Coupons
- Sales
- Expired
Expired Offers
Free Shipping
More Ways to Save at Grenco Science
Get a Sign-Up Discount - When you subscribe to GPen's newsletter, you'll receive a discount of 15% off your subsequent purchase.
Join the Loyalty Program - Join the loyalty program called Loyal G as a member to receive points, discounts, and special offers. Click on the link to sign up and earn points on every eligible purchase on the site. Redeem the points you’ve collected for great discounts.
Refer a Friend - Give your friends a 15% discount on their initial purchase, and you will receive a 20% discount for every successful referral. To refer someone, click on the link.
Get Special Discounts - Grenco Science or G Pen offers essential worker discounts for a flat 35% discount to military personnel, first responders, medical professionals, teachers, and senior citizens. Click on the link and verify your identity to get the discount.
Get Free Shipping - For orders over $75, GPen provides free domestic ground shipping and doorstep delivery.
Shop the Items on Sale - Simply keep an eye out for items with red circle tags showing their corresponding reductions.
Grenco Science Shipping Policy
Gpen.com ships to the United States for free when you shop for more than $75. All purchases will be processed and dispatched within 1-2 business days. In accordance with how fast they like the delivery to be delivered, the client may select from a variety of shipping options. The two main courier services we provide through the online store are UPS and USPS. The delivery timeframes listed at the time of purchase are just estimates given by the carriers and are not guaranteed.
Click here to find out more.