Hello Boromarket I have an awesome sculpted frog rig for sale. It has a 10 mm female joint, 10 mm downstem with a closed bottom and 3 small holes. Water tested and it rips hard. Super stoked with the function on this rig. Hollow front arms made by Bent wizard glass, and I built the rest of it. Solid back legs and detailed feet. Ti signed. I accept paypal or postal money orders. Check out more of Bent Wizards work on instagram @BentWizardGlass, and my IG@vastglass and you can catch me blowing glass live on twitch. Thanks for looking. Buyer responsible for fees and shipping cost.