The spacerring is a precision detail made of non-magnetic alloy or polymer.
该间隔环是精确详细的非磁性合金或高分子的。
2
The spacerring can be solid or it can have a hole in the center.
隔板可以是实心的。或在其中央有一个孔。
3
I'm sort of ambivalent regarding the grip ring (some people seem to not like it) but I did order some spacer rings which can be used on either the TK12 or TK15 if you replace the grip ring.