Serrow 225 3RW 1: Replace the hardened O-ring of the carburetor main jet part
On 2018-01-30 22:01:31
Equivalent to the O-ring of the main jet part of the genuine carburetor (BST 34). The size is P-7. The number is one. Since it is not genuine, it is self-responsible, but it can be used without problems.
It is used for presser rubber when holding objects with precision tweezers. Until then it was substituted by a shortened silicon tube but it is harder to break than silicone rubber and it is comfortable to use because it is easy to slide even though it can be held securely.
I am sorry that it is not the original usage.