Stainless steel roller ball and natural colored holder for glass roll on bottle 16mm neck - Liquid Bottles LLC
Amazon.com: Stainless Steel Roller Balls & Lids for Standard 5, 10, 15, and 30 ml essential oil vials. (Leak-proof, and fits on your oil bottle) Pack of 6 rollers & 6 lids.
Amazon.com: 12 Stainless Steel Roller Ball Roll On Inserts for Essential Oil Bottles 5ml and 15ml Amber doTERRA and Young Living Bottles : Beauty & Personal Care