| MODEL | CAPACITY(GALLONS) | CAPACITY(LITRES) | EXTERNAL DIMENSION MM(INCHES) | |||
| EFFECTIVE | NOMINAL | EFFECTIVE | NOMINAL | DIAMETER | HEIGHT | |
| N400 | 450 | 530 | 2043 | 2406 | 1500(59) | 1350(53) |
| N500 | 550 | 650 | 2497 | 2951 | 1500(59) | 1650(65) |
| N600 | 650 | 740 | 2951 | 3360 | 1500(59) | 1900(75) |
| N800 | 860 | 950 | 3904 | 4313 | 1600(63) | 2185(86) |
| N900 | 970 | 1,060 | 4404 | 4812 | 1600(63) | 2413(95) |
| N1000 | 1,080 | 1,170 | 4903 | 5312 | 1600(63) | 2620(103) |
| N1000A | 1,080 | 1,290 | 4903 | 5857 | 2440(96) | 1250(49) |
| N1000B | 1,000 | 1,040 | 4540 | 4722 | 1905(75) | 1800(71) |
| N1250A | 1,280 | 1,320 | 5811 | 5993 | 1905(75) | 2110(83) |
| N1500 | 1,500 | 1,610 | 6810 | 7309 | 2440(96) | 1650(65) |
| N1500A | 1,500 | 1,630 | 6810 | 7400 | 1905(75) | 2620(103) |
| N2000 | 2,070 | 2,380 | 9398 | 10805 | 2440(96) | 2210(87) |
| N2500 | 2,550 | 2,640 | 11577 | 11986 | 2440(96) | 2650(104) |
| N3000 | 3,090 | 3,300 | 14029 | 14982 | 2440(96) | 3200(126) |
| N3500 | 3,500 | 3,620 | 15890 | 16435 | 2440(96) | 3510(138) |
| N4000 | 4,190 | 4,410 | 19023 | 20021 | 2800(110) | 3639(143) |
| N5000 | 5,150 | 5,430 | 23381 | 24652 | 2800(110) | 4377(172) |
| N6000 | 6,000 | 6,300 | 27240 | 28602 | 2800(110) | 4620(182) |
| N7000 | 7,000 | 7,410 | 31780 | 33641 | 2800(110) | 5461(215) |
| N8000 | 8,240 | 9,370 | 37410 | 42540 | 3300(130) | 4986(196) |
| N10000 | 10,030 | 11,400 | 45536 | 51756 | 3300(130) | 6048(238) |
