1 Hole Black Rubber Stoppers. Made of dense, soft natural rubber with low sulfur content. Creates a tight seal for test tubes, flasks and other laboratory glassware.
- Remains pliable over a great period of time
- Perfect for use with non-aggressive or concentrated solutions
- Withstand temperatures from –25 to 70°C (–13 to 158°F)
- Each stopper has the size number in raised letters on the top
- Resilient
Stopper Size
|
Top Diameter
|
Bottom Diameter
|
0
|
17mm
|
13mm
|
00
|
15mm
|
10mm
|
1
|
19mm
|
14mm
|
2
|
20mm
|
16mm
|
3
|
24mm
|
18mm
|
4
|
26mm
|
20mm
|
5
|
27mm
|
23mm
|
5.5
|
28mm
|
24mm
|
6
|
32mm
|
26mm
|
6.5
|
34mm
|
27mm
|
7
|
37mm
|
30mm
|
8
|
41mm
|
33mm
|
9
|
45mm
|
37mm
|
10
|
50mm
|
42mm
|
10.5
|
53mm
|
46mm
|
11
|
56mm
|
48mm
|
11.5
|
60mm
|
52mm
|
12
|
64mm
|
54mm
|
13
|
68mm
|
58mm
|
13.5
|
75mm
|
62mm
|
14
|
90mm
|
75mm
|
15
|
103mm
|
83mm
|