OLizee Magnetic Non-Slip Project Mat for Smart Phone, Laptop and Electronics Disassembly Size: About 11.8" x 9.8"(30 x 25cm), about 0.03" (0.7mm) thick. Dry erase surface lets you keep notes while preventing errors. Repair can be tough. This mat makes it easier! Simply organizes all your parts while you work on a device. You can use markers to write memos on the mat. Help you memory the position of each screw, educes reassembly time. Package includes: 1* Magnetic Mat, 1* Pen free offer! Note: Normal pen and ball pen are not allowed!