Dear Sir ,We are Al-Wessam for Import, Export and trade company , An Egyptian Company work in spare parts for bus and heavy transport trucks .Hoping to cooperate with your company through the high quality and best price for sliding lock ,the material is Injection Cast ( used for pulling the bus window) , please send to us by your email to enable us sending the photos of our item we need . We appreciate your prompt reply Best Regards ,Reham Hamdy Commercial Department