La Tromba 511 Cork&Slide Grease is a lubricant specifically designed for trombones. The lubricant is designed to lubricate the corks and slide rods of the trombone, allowing the instrument to be operated smoothly and easily. The lubricant also prevents the corks and slide rods from getting stuck and damaged. La Tromba 511 Cork&Slide Grease is easy to apply and comes in a convenient package that is perfect for musicians who are on the road a lot. This lubricant is a popular choice among trombonists of all levels, from beginners to professional musicians.