分度柱塞,有或没有休息在缩回位置,钢螺纹体和锁定螺母:镀锌钢。柱塞:AISI 303不锈钢。升降环/椭圆形孔:AISI 301不锈钢。弹簧:AISI 301不锈钢。旋钮:高回弹性聚酰胺基(PA)技术聚合物,黑色,磨砂。标准执行:GN 717-A-ST:吊环,不带锁紧螺母。GN 717-AK-ST:升降环,带锁紧螺母。GN 717-B-ST:升降旋钮,无锁紧螺母。GN 717-BK-ST:升降旋钮,带锁紧螺母。GN 717-C-ST:提升旋钮和支架处于收缩位置,不需要锁紧螺母。 GN 717-CK-ST lifting knob and rest in retracted position, with locking nut. GN 717-D-ST: lifting oval eyelet, without locking nut. GN 717-DK-ST: lifting oval eyelet, with locking nut.