| 8VL | 9VL | 10VL | 12VL | |
| Length | "8' 6" (2.60m) | 9' 6" (2.90m) | 10' 6" (3.19m) | 12' 0" (3.60m)" |
| Beam | "5' 6" (1.68m) | 5' 7" (1.72m) | 5' 7" (1.72m) | 5' 11" (1.77m)" |
| Ins. Length | "5' 8" (1.74m) | 6' 9" (2.05m) | 7' 7" (2.30m) | 8' 9" (2.67m)" |
| Ins Beam | "2' 6" (0.77m) | 2' 8" (0.82m) | 2' 8" (0.82m) | 2' 9" (0.83m)" |
| Internal Area | 14.4 ft² (1.3m²) | 18.1 ft² (1.7m²) | 20.3 ft² (1.9m²) | 23.8 ft² (2.2m²) |
| Weight | 95 lb (43kg) | 106 lb (48kg) | 123 lb (56kg) | 156 lb (71kg) |
| Max Person Cap. | 4 | 4 | 5 | 6 |
| Tube Diameter | 16" (0.40m) | 17" (0.43m) | 17" (0.43m) | 18" (0.46m) |
| Shaft Length | 15" | 15" | 15" | 15" |
| Max Weight Cap. | 964 lb (438kg) | 1056 lb (480kg) | 1269 lb (577kg) | 1650 lb (750kg) |
| Rec HP | 8hp (6kw) | 9.9hp (7.4kw) | 15hp (11.2kw) | 20hp (14.9kw) |
| Max HP | 10hp (7.5kw) | 15hp (11.2kw) | 25hp (18.7kw) | 30hp (22.4kw) |
| No. Air Chambers | 3 | 3 + 1 | 3 + 1 | 3 + 1 |