G Pen Vaporizer by Grenco Science is ultra compact, with a smaller vaporizer heating chamber and vape pen battery. GPen for wax, the Pro and Elite for dry. gpen dry herb on Grenco Science. Showing 34 results for "gpen dry herb". G Pen Elite Vaporizer. 1. SKU: GPEAFZZ. $ $ Reviews. Jun 13, - 1 min - Uploaded by Crystal Mcbootay get it now - herbsfuzion.com Loading G Pen dry herb vaporizer cartridge. dry herb on Grenco Science. Showing 2 results for "dry herb". Related Searches: dry herb vape, g pen dry herb · G Pen Pro Vaporizer. 1. SKU: GPP -AGZZ. Jun 13, - 1 min - Uploaded by Crystal Mcbootay get it now - herbsfuzion.com Jan 19, - 6 min - Uploaded by Vay Pin Snoop Dogg Gpen review and demo. Takes a second to get it going. I'd recommend half.