Dear Sunantinee,
1. OD 40x35x5 mm. = 1,500 Pcs.
2. OD 35x30x4-4.5 mm. = 1,500 Pcs
Our factory produced it as the above sizes and showed in the PI.
Maybe before Luna made the drawing as o ring to you.Actually based on
your sizes,it's a rubber flat ring.
You could have a test on your equipment if it can be used after you receive the goods.
Regards,