This listing is for NEW, UNUSED K.B. Canham 110x110mm flat lens boards. They are the best-made lens boards for the 110x110mm standard. They measure ~.105" in thickness. Some are still in their original plastic wrap, others are not. They are made by K.B. Canham for their 4x5, 4x10 and 5x7 cameras. They are made to the Toyo/Omega 110x110mm dimensions. They ARE NOT compatible with the Arca Swiss 110x110 standard. They are supposedly a little thicker than the original Toyo boards, they may or may not fit on certain standards. I do not have any original Toyo lens boards that I can compare them with. I have used Canham boards on 4x5 and 8x10 (with Toyo adapter) Toyo cameras without issue - they were a tight fit on my cameras. NOTE: ALL OF THE LENS BOARDS STILL IN PLASTIC HAVE BEEN SOLD. THE REMAINING BOARDS WERE REMOVED FROM THEIR PLASTIC WRAP, BUT NEVER USED. DON'T ASK ME WHY - I HAVE NO GOOD REASON.