Sheeba Engineering Co. Offers Sealed Gravity Lock Spring. Sheeba Engineering Co. Supplies a wide range of carriers and accessories like Perforated Triangular Spindles, Loading and Unloading Basket Dye Springs etc. For yarn and fibre dyeing in textile industries. The Sealed Gravity Lock Spring is a Gravity Lock with spring having distance piece for protection of spring with inside gasket. The Sealed Gravity Lock Spring comes with Shaft or inner sealing for an optimal seal between the cap and the spindle bolt and is also available with lever arm for opening for automatic loading and unloading.