Aluminum
Cylinder Size (cu.ft.)	Max Service Pressure (psi)	Outside Diameter (in.)	Length (in.)	Weight Empty (lbs.)	Saltwater Buoyancy Empty (lbs.)	Saltwater Buoyancy Full (lbs.)
13	2015	4.4	12.9	5.8	0.7	-0.6
15	3000	4.4	16.5	5.4	1.7	0.0
19	3000	4.87	19.5	8.2	0.4	-1.4
30	3000	4.87	21.8	13	1.1	-0.23
50	3000	6.9	19	21.1	1.0	-2.58
63	3000	7.25	21.8	26.7	2.4	0.29
80	3000	7.25	26	33	4.1	-1.9

Steel
Cylinder Size (cu.ft.)	Max Service Pressure (psi)	Outside Diameter (in.)	Length (in.)	Weight Empty (lbs.)	Saltwater Buoyancy Empty (lbs.)	Saltwater Buoyancy Full (lbs.)
60	3300	6	22	22.7	-2.5	-7.1
71.4 (slim)	3300	6	25.93	26	-2.3	-7.6
71.4 (shorty)	3300	6.8	20.47	29	-5.9	-11.3
72 (standard)	2475	6.9	25	29	-1	-6
81	3000	7.25	22.4	31.1	-4	-10
95.1	2640	8	23.82	37.62	-1.2	-8.5
104	2640	8	26.25	46	-1	-9.7
120	2640	8.0	29.25	52.0	0.0	-9.7
80	3500	7.25	19.7	27.0	-1.0	-8.0
100	3500	7.25	23.9	33.0	-0.0	-8.2
120	3500	7.25	27.9	38.0	1.0	-10.0