DreambuilderToy 15.75" X 15.75" Gray Building Construction Base Plates - 4 Pack Bundle, Compatible with All Major Brands, Great for Playing Table [GREAT DEAL]- 4 pieces of Dark Gray 50x50 Baseplate, 15.75"x15.75" or 40cm x 40 cm. [FUN TO PLAY]--Perfect for building playing table, will hold your construction tight even when you put it upside down [STRONGER AND MORE DURABLE]-- Much durable than all other brand 15x15 base plate, Guaranteed NO bend, No wrap, No bow [COMPATIBLE WITH ALL MAJOR BRAND]: You can mixed play with all major brand bricks, an affordable way to increase building options!