Own a G Pen Connect and it doesn't fit your favourite glass rig? Don't stress because our female glass adapters allow you to connect your new favourite concentrate vaporizer to any male-jointed bong or dab rig so you can continue your awesome smoking sessions without the need for a torch and nail set up. Just slide the adapter over your male ground joint and you're good to go. The female adapters comes in three sizes, 10mm, 14mm and 18mm, so you're bound to find the right one to fit your much-loved rig.