23 gauge for me and I usually heat the oil up just a tad in a cup of Luke warm water in the summer when the house is freezing from the air being on. And yeah for years I never changed my draw needle, big mistake and not to mention after so many shots you develop scar tissue unless you’re getting tissue work or lucky maybe. I started with 21 gauge lol at least the gear gets in quick but it’s too much I’ve tried slin pins and front loading etc can’t do it just doesn’t work for me, slin pins for melanotan hgh and glutathione