outside diameter of neck A , in mm	S for PN 2.5, in mm	S for PN 6, in mm	S for PN 10, in mm	S for PN 16, in mm
17.2	2	2	2	2
21.3	2	2	2	2
26.9	2.6	2.6	2.6	2.6
33.7	2.6	2.6	2.6	2.6
42.4	3.2	3.2	3.2	3.2
48.3	3.2	3.2	3.2	3.2
60.3	3.2	3.2	3.2	3.2
76.1	3.2	3.2	3.2	3.2
88.9	3.2	3.2	3.2	3.2
114.3	3.2	3.2	3.2	3.2
139.7	4	4	4	4
168.3	5	5	5	5
219.1	5	5	5	6
273	8	8	8	10
323.9	8	8	8	10
355.6	8	8	8	10
406.4	8	8	8	10
457	8	8	8	-
508	8	8	8	-