橡胶圈部分采用蓝色硅橡胶或透明硅橡胶。
硅橡胶可提供较高的温度范围，确保较长的使用寿命。
硅橡胶(蓝色或透明)橡胶圈可作为备件，磨损后可替换。
硅橡胶制成的橡胶圈预计可使用100万次。
The elastic part can be in blue Silicone, or transparent silicone.
Silicone can be used over a wider temperature range and assures a longer life time.
The elastic part in Silicone is available as a spare part and can be replaced,when worn out.
The expected medium life time of the elastic part in Silicone is about 1 million cycles.
