Features: This 17 piece silicone plugs set offer multifunction hydraulic oil service solution with three size (5 large, 10 mediums, 20 small), to secure seal various automotive and industrial component. Crafted from oil resistant multiple component rubber, these plugs feature dimension up to 5.51" length and withstands repeated use in demanding environment. Ideal for mechanics, enthusiasts, and workshop professional requiring fluid systems maintenance tool. Perfect for sealing hydraulic lines, transmission pan, or engine oil passages during repairs, upgrades, or routine vehicle servicing. The graduated sizing systems ensures compatibility with multiple equipment types, while the flexible silicone construction prevents leaks under extreme pressure conditions. Specifications: Component:Silicone Size:Approx.13.5mm/0.53''x55mm/2.17'' (10pcs),29mm/1.14''x68.7mm/2.7'' (5pcs),55mm/2.17''x138mm/5.43''(2pcs) Package Includes: 17pcs Hydraulic Oil Service Plugs note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.