Contains the external o ring (55561100) on the brake vacuum pump and the internal o ring (55561102) for the pump.These 2 o rings are the most common cause of brake vacuum pump leaks on 2.0T engines.Also includes 3 screws to secure the pump halves. The brake vacuum pump o rings are made of a high-quality materiall with excellent abrasion and ageing , ensuring a tight and leakproof seal in long term use and reducing the risk of air leaks. Enhanced Efficiency: The kit enables better sealing when the brake vacuum pump is in operation, ensuring that the system operates efficiently and improving the overall safety and driving stability of the vehicle. Item Type: Brake Vacuum Pump O Ring Kit name: Brake Vacuum Pump O Ring Kit Part Number: 55561100 55561102 Fitment: Replacement for 9-3 2003-2011 with 2.0T B207 Engine Replacement for 9-5 2011 2.0T Fit for Regal 2011-2013 2.0T Fit for Verano 2013-2016 2.0T Material: Rubber+ Metal Color: Black + silver Package Contents: 1 x Brake Vacuum Pump O Ring Kit(5pcs) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.