£1.89

Tube OD: 4 mm Stem OD: 4 mm

£2.12

Tube OD: 5 mm Stem OD: 5 mm

£2.15

Tube OD: 6 mm Stem OD: 6 mm

£2.70

Tube OD: 8 mm Stem OD: 8 mm

£3.71

Tube OD: 10 mm Stem OD: 10 mm

£4.43

Stem OD: 12 mm Tube OD: 12 mm