The product is made of acid-resistant steel. It is used when we modify the exhaust system and want to plug unnecessary sony lambda sockets. The assembly consists in screwing the plug into the socket of the old probe. Thanks to the use of stainless steel, we are sure that our plug will never corrode, and we will not they had problems with removing it in the future. Additionally, the attached brass washer ensures perfect sealing of the system. The cap can be tightened with an open-end wrench 24 The cap is universal, it fits almost all lambda sensors. It has a M18x1.5 thread. The product is made of acid-resistant steel. It is used when we modify the exhaust system and want to plug unnecessary sony lambda sockets. The assembly consists in screwing the plug into the socket of the old probe. Thanks to the use of stainless steel, we are sure that our plug will never corrode , and we won't have any problems with removing it in the future. Additionally, the included brass washer ensures perfect sealing of the system. The cap can be tightened with an open-ended spanner 24 The cap is universal, it fits almost all lambda sensors. It has a M18x1.5 thread.