EKS Solingen Hi Tech Oil Pen EK 11-4Measures 6 1 4" overall. 7 mm stainless tip. 12 ml 0. 4 fl. oz tube with needle style applicator tip. Approx. 1,000 drops. Ster Ol is engineered for the lubrication of surgical and medical instruments, prior to sterilization. Easy to apply. Helps to preserve the full functionality and longevity of valuable surgical equipment. Prevents rust. Useful for lubricating medical and surgical instruments, as well as podiatry, dental and laboratory instruments.