Made of high quality plastic, sturdy and durable. Chrome plated surface, smooth and beautiful. NOTE:Due to the differences in the tank holes,please check the size before purchasing. Dual buttons can choose full drain or half drain for better water conservation. The total length of the torsion bar is 10cm,the rotating length can be shortened and lengthened. You can adjust the length according to your needs The Dual Flush Toilet Kit button fits a 38 mm tank lid hole.1. Unscrew the lock nut and insert the button into the hole. (Full and half row buttons need to be aligned) Check that the button lever is in contact with the button. If it is too long, shorten it. If it is too short, adjust the button lever outward to the desired length and screw in the lock nut until it is secure. The total length of the torsion bar is 10 centimeters, and the rotating length can be shortened and lengthened. You can adjust the length according to your needs. Service:If you have any need or any question,you can contact us,we will reply your email within 24 hours.