Luer Tips

Needle wire gauge information from Wikipedia

Needle	Nominal outer diameter			Nominal inner diameter			Nominal wall thickness			Color
Gauge	inches	mm	tol. inches (mm)	inches	mm	tol. inches (mm)	inches	mm	tol. inches (mm)	(standard)
7	0.180	4.572	±0.001 (±0.025)	0.150	3.810	±0.003 (±0.076)	0.015	0.381	±0.001 (±0.025)
8	0.165	4.191	±0.001 (±0.025)	0.135	3.429	±0.003 (±0.076)	0.015	0.381	±0.001 (±0.025)
9	0.148	3.759	±0.001 (±0.025)	0.118	2.997	±0.003 (±0.076)	0.015	0.381	±0.001 (±0.025)
10	0.134	3.404	±0.001 (±0.025)	0.106	2.692	±0.003 (±0.076)	0.014	0.356	±0.001 (±0.025)
11	0.120	3.048	±0.001 (±0.025)	0.094	2.388	±0.003 (±0.076)	0.013	0.330	±0.001 (±0.025)
12	0.109	2.769	±0.001 (±0.025)	0.085	2.159	±0.003 (±0.076)	0.012	0.305	±0.001 (±0.025)
13	0.095	2.413	±0.001 (±0.025)	0.071	1.803	±0.003 (±0.076)	0.012	0.305	±0.001 (±0.025)
14	0.083	2.108	±0.001 (±0.025)	0.063	1.600	±0.003 (±0.076)	0.01	0.254	±0.001 (±0.025)	14: Dark Green
15	0.072	1.829	±0.0005 (±0.013)	0.054	1.372	±0.0015 (±0.038)	0.009	0.229	±0.0005 (±0.013)	15: Orange
16	0.065	1.651	±0.0005 (±0.013)	0.047	1.194	±0.0015 (±0.038)	0.009	0.229	±0.0005 (±0.013)	16: Purple
17	0.058	1.473	±0.0005 (±0.013)	0.042	1.067	±0.0015 (±0.038)	0.008	0.203	±0.0005 (±0.013)	17: White
18	0.050	1.270	±0.0005 (±0.013)	0.033	0.838	±0.0015 (±0.038)	0.0085	0.216	±0.0005 (±0.013)	18: Pink
19	0.042	1.067	±0.0005 (±0.013)	0.027	0.686	±0.0015 (±0.038)	0.0075	0.191	±0.0005 (±0.013)	19: Brown
20	0.03575	0.9081	±0.00025 (±0.0064)	0.02375	0.603	±0.00075 (±0.019)	0.006	0.1524	±0.00025 (±0.0064)	20: Yellow
21	0.03225	0.8192	±0.00025 (±0.0064)	0.02025	0.514	±0.00075 (±0.019)	0.006	0.1524	±0.00025 (±0.0064)	21: Light Green
22	0.02825	0.7176	±0.00025 (±0.0064)	0.01625	0.413	±0.00075 (±0.019)	0.006	0.1524	±0.00025 (±0.0064)	22: Black
22s	0.02825	0.7176	±0.00025 (±0.0064)	0.006	0.152	±0.00075 (±0.019)	0.0111	0.2826	±0.00025 (±0.0064)
23	0.02525	0.6414	±0.00025 (±0.0064)	0.01325	0.337	±0.00075 (±0.019)	0.006	0.1524	±0.00025 (±0.0064)	23: Light Blue
24	0.02225	0.5652	±0.00025 (±0.0064)	0.01225	0.311	±0.00075 (±0.019)	0.005	0.1270	±0.00025 (±0.0064)	24: Red
25	0.02025	0.5144	±0.00025 (±0.0064)	0.01025	0.260	±0.00075 (±0.019)	0.005	0.1270	±0.00025 (±0.0064)	25: Blue
26	0.01825	0.4636	±0.00025 (±0.0064)	0.01025	0.260	±0.00075 (±0.019)	0.004	0.1016	±0.00025 (±0.0064)	26: Beige
26s	0.01865	0.4737	±0.00025 (±0.0064)	0.005	0.127	±0.00075 (±0.019)	0.0068	0.1734	±0.00025 (±0.0064)
27	0.01625	0.4128	±0.00025 (±0.0064)	0.00825	0.210	±0.00075 (±0.019)	0.004	0.1016	±0.00025 (±0.0064)	27: Grey
28	0.01425	0.3620	±0.00025 (±0.0064)	0.00725	0.184	±0.00075 (±0.019)	0.0035	0.0889	±0.00025 (±0.0064)
29	0.01325	0.3366	±0.00025 (±0.0064)	0.00725	0.184	±0.00075 (±0.019)	0.003	0.0762	±0.00025 (±0.0064)
30	0.01225	0.3112	±0.00025 (±0.0064)	0.00625	0.159	±0.00075 (±0.019)	0.003	0.0762	±0.00025 (±0.0064)	30: Lavender
31	0.01025	0.2604	±0.00025 (±0.0064)	0.00525	0.133	±0.00075 (±0.019)	0.0025	0.0635	±0.00025 (±0.0064)
32	0.00925	0.2350	±0.00025 (±0.0064)	0.00425	0.108	±0.00075 (±0.019)	0.0025	0.0635	±0.00025 (±0.0064)
33	0.00825	0.2096	±0.00025 (±0.0064)	0.00425	0.108	±0.00075 (±0.019)	0.002	0.0508	±0.00025 (±0.0064)
34	0.00725	0.1842	±0.00025 (±0.0064)	0.00325	0.0826	±0.00075 (±0.019)	0.002	0.0508	±0.00025 (±0.0064)