1/2 x 4 XH nipple
3 X 4 XH nipple
1/4 x 4 XH nipple
3/8 x 4 XH nipple
3/4 x 4 XH nipple
1 X 4 XH nipple
1 1/4 x 4 XH nipple
1 1/2 x 4 XH nipple
2 X 4 XH nipple