The spider fittings are used for fixuping glasses. There are two kinds: Light spider fittings: SFA-01(one way), SFA-02(two way), SFA-03(two way), SFA-04(three way), SFA-05(four way), SFA-06, SFA-07, SFA-08, SFA-09, SFP-02 ;
Heavy spider fittings: SFA-01B, SFA-02B, SFA-03B, SFA-04B, SFA-05B, SFA-06B, SFA-07B, SFA-08B, SFA-09B and so on.