Sheeba Engineering Co. Offers Spring Type Cup Bottom Gravity Lock. 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 Spring Type Cup Bottom Gravity Lock is used directly on plastic tubes without top plates and comes with Shaft /inner sealing for an optimal seal between the cap and the spindle bolt. The Spring Type Cup Bottom Gravity Lock is suitable for plastic dye tube having sizes 63 OD X 57 ID and 62 OD X 54 ID.