Our Vacuum bell jars are available in many sizes, including the popular and enduring 12" x 14" used on laboratory coating units. Unlike some suppliers our Bell Jars and Cylinders are measured on the internal diameter (ID) as we are aware that some supplier's bell jars are a tight, if not impossible fit over existing electrode configurations.

All our Vacuum Bell Jars and Cylinders are manufactured from Borosilicate glass, the edges are fire polished and then ground. After manufacture all are fully annealed to give maximum strength and minimum stress within the material.

Stock Sizes for Bell Jars
Nominal Size	Actual Size (ID)	Max Height
12"	301mm	500mm
Note: Bell Jars can be cut to the required Height.

Stock Bell Jar Cut to Height.
Nominal Size	Actual Size (ID)	Max Height
12"	301mm	360mm

Stock Sizes for Cylinders.
Nominal Size	Actual Size (ID)	Max Height
6"	151mm	275mm
8"	204mm	275mm
10"	239mm	275mm
12"	301mm	356mm
* 12"s	286mm IDx 300mm OD	356mm

* = For use on early Edwards plant which were fitted with smaller (approximately 310mm OD) top plates.

For full details Please take a look at our Belljar Gaskets Site

Stock Sizes For Bell Jar Gaskets
Size Chart (inches)

Size/Dash	Jar OD	Gasket ID	Dim A	Dim B	T1 Dim	T2 Dim	Stock Material
4	4	3.750	0.500	0.375	0.075	0.075	Viton,Nitrile
5	5	4.750	0.500	0.375	0.103	0.075	Viton,Nitrile
6	6	5.570	0.500	0.375	0.103	0.075	Viton,Nitrile
8	8.25	7.750	0.500	0.375	0.103	0.075	Viton,Nitrile,Silicone
9F	8.75	8.750	0.500	0.375	0.103	0.075	Viton,Nitrile
10	10.25	9.25	0.750	0.500	0.125	0.094	Viton,Nitrile,Silicone
12 12F	12.5 12	11.500 12.250	0.075 0.500	0.500 0.375	0.125 0.103	0.094 0.075	Viton,Nitrile Nitrile
14	14.25	13.125	1.000	0.500	0.125	0.094	Viton,Nitrile
15	15.375	14.500	1.000	0.500	0.125	0.094	Nitrile
18	18	17.250	1.125	0.625	0.125	0.094	Viton,Nitrile

Available in Silicone, Viton, and Nitrile.