Polished Surfaced.
Other Details:

Type	Thread (G)*	ØB	H	C	ØQ	ØR	SW	Weight (kg)
QE05MC-NN	3/8"	11	54	51	32	26	22	00,7
QE05MD-NN	½"	15	62	58	37	32	25	0,10
QE05ME-NN	¾"	20	72	66	48	41	32	0,20
QE05MF-NN	1"	26	76	70	55	47	38	0,25
QE05MG-NN	1¼"	34	79	73	64	57	49	0,35
QE05MH-NN	1½"	38	81	76	70	72	53	0,50
QE05MI-NN	2"	50	89	84	81	83	68	0,75