How to write two dimension of a slot or rectangle?

Are there Standards Sizes for Extruded T-slot Aluminum Profiles? Yes, there are standard sizes for extruded T –Slot aluminum profiles Whenever you order

Slot Sizes ; 40 0165, 420 420 ; 45 0138, 354 354

standard slot sizes For 2 or 4 holes: 18″ & 316″ are the only hole sizes available If you are using Pop Rivets to mount your tags, you must use a larger hole than your pop

standard parking slot size The standard T slot bolts are typically made of T slot bolts come in various sizes and lengths to accommodate different slot sizes and depths