Polished Surfaced.
Other Details:

Type	Thread (G)*	ØB	H	C	ØQ	ØR	SW	T	ØU	Weight (kg)
QF05MC-14	3/8"	11	59	55	35	26	22	20	14	00,8
QF05MD-18	½"	15	65	60	39	32	25	24	18	0,11
QF05ME-23	¾"	20	75	71	49	41	32	24	23	0,18
QF05MF-29	1"	25	79	73	54	47	38	30	29	0,24
QF05MG-38	1¼"	35	85	80	63	57	49	30	38	0,30
QF05MH-44	1½"	40	87	81	71	72	53	30	44	0,44
QF05MI-55	2"	52	100	95	85	83	68	40	55	0,65