Quantity   Component name
1 × Peizo Disk there are roughly two kinds of PZT disks out there. PZT4,8, the so-called hard PZT, mostly used for generating ultrasonic waves. or PZT5, the so-called soft PZT. I sourced the Peizo Disk with 0.3mm of PZT5 ceremic material. 3.2RMB each from https://detail.1688.com/offer/559853657218.html?spm=a360q.8274423.1130995625.27.49c84c9aONQ3Mt
3 × Optical Z table Screw Set 0.25mm Optical Table Screw Set. 45RMB/pair, I sourced it from https://item.taobao.com/item.htm?spm=a1z09.2.0.0.55d32e8d2rOaAG&id=521730126303&_u=u3jivci4c156