OD: 8 mm; ID: 6.4 mm (20 gauge) Close but Unsoldered OD: 7 mm; ID: 5.4 mm (20 gauge) Close but Unsoldered OD: 6 mm; ID: 4.6 mm (21 gauge) Close but Unsoldered OD: 6 mm; ID: 4.4 mm (20 gauge) Close but Unsoldered OD: 5 mm; ID: 3.6 mm (21 gauge) Close but Unsoldered OD: 5 mm; ID: 3.4 mm (20 gauge) Close but Unsoldered OD: 5 mm; ID: 3 mm (18 gauge) Close but Unsoldered OD: 4 mm; ID: 2.8 mm (22 gauge) Close but Unsoldered OD: 4 mm; ID: 2.6 mm (21 gauge) Close but Unsoldered OD: 4 mm; ID: 2.4 mm (20 gauge) Close but Unsoldered OD: 4 mm; ID: 3 mm (20 gauge) Close but Unsoldered Perfect for your DIY project! Ref GRJ1 TO GRJ11