| red label Cello sets | |||||
| Model Number | Strings | Make | Size | Gauge | Tension |
| 6106 | A,D,G,C | Nickel | 4/4 | Soft | |
| 6107 | A,D,G,C | Nickel | 4/4 | Medium | |
| 6108 | A,D,G,C | Nickel | 4/4 | Orchestra Gauge | |
| 6105 | A,D,G,C | Nickel | 3/4 | Orchestra Gauge | |
| 6104 | A,D,G,C | Nickel | 1/2 | Orchestra Gauge | |
| 6103 | A,D,G,C | Nickel | 1/4 | Orchestra Gauge | |
| 6102 | A,D,G,C | Nickel | 1/8 | Orchestra Gauge | |
| red label Cello Single Strings | |||||
| Model Number | Strings | Make | Size | Gauge | Tension |
| 6116 | A | Nickel | 4/4 | Soft | 30.1 |
| 6117 | A | Nickel | 4/4 | Medium | 34.7 |
| 6118 | A | Nickel | 4/4 | Orchestra Gauge | 33.8 |
| 6115 | A | Nickel | 3/4 | Orchestra Gauge | |
| 6114 | A | Nickel | 1/2 | Orchestra Gauge | |
| 6113 | A | Nickel | 1/4 | Orchestra Gauge | |
| 6112 | A | Nickel | 1/8 | Orchestra Gauge | |
| 6126 | D | Nickel | 4/4 | Soft | 25.8 |
| 6127 | D | Nickel | 4/4 | Medium | 29.4 |
| 6128 | D | Nickel | 4/4 | Orchestra Gauge | 30.8 |
| 6125 | D | Nickel | 3/4 | Orchestra Gauge | |
| 6124 | D | Nickel | 1/2 | Orchestra Gauge | |
| 6123 | D | Nickel | 1/4 | Orchestra Gauge | |
| 6122 | D | Nickel | 1/8 | Orchestra Gauge | |
| 6136 | G | Nickel | 4/4 | Soft | 25.5 |
| 6137 | G | Nickel | 4/4 | Medium | 27.9 |
| 6138 | G | Nickel | 4/4 | Orchestra Gauge | 31.7 |
| 6135 | G | Nickel | 3/4 | Orchestra Gauge | |
| 6134 | G | Nickel | 1/2 | Orchestra Gauge | |
| 6133 | G | Nickel | 1/4 | Orchestra Gauge | |
| 6132 | G | Nickel | 1/8 | Orchestra Gauge | |
| 6146 | C | Nickel | 4/4 | Soft | 29.1 |
| 6147 | C | Nickel | 4/4 | Medium | 28.1 |
| 6148 | C | Nickel | 4/4 | Orchestra Gauge | 29.1 |
| 6145 | C | Nickel | 3/4 | Orchestra Gauge | |
| 6144 | C | Nickel | 1/2 | Orchestra Gauge | |
| 6143 | C | Nickel | 1/4 | Orchestra Gauge | |
| 6142 | C | Nickel | 1/8 | Orchestra Gauge | |
| 6156 | E | Nickel | 4/4 | Soft | 32.8 |
| 6157 | E | Nickel | 4/4 | Medium | 37.6 |
| 6158 | E | Nickel | 4/4 | Orchestra Gauge | 42.8 |
| 6155 | E | Nickel | 3/4 | Orchestra Gauge | |
| 6154 | E | Nickel | 1/2 | Orchestra Gauge | |
| 6153 | E | Nickel | 1/4 | Orchestra Gauge | |
| 6152 | E | Nickel | 1/8 | Orchestra Gauge | |
