NINGBO YINZHOU GESUN IMPORT AND EXPORT CO.，LTD
| size | hole diameter | segment dimension | segment number |
| 105MM | 16/20/22.23mm | 1.2*7*1.9MM | 8 |
| 110MM | 16/20/22.23mm | 1.2*7*1.9MM | 9 |
| 115MM | 20/22.23mm | 1.2*7*1.9MM | 9 |
| 125MM | 20/22.23mm | 1.2*7*1.9MM | 9 |
| 150MM | 20/22.23mm | 1.4*7*2MM | 12 |
| 180MM | 22.23/25.4/30mm | 1.6*7*2.2MM | 14 |
| 230MM | 22.23/25.4/30mm | 1.8*7*2.4MM | 18 |
| 250MM | 22.23/25.4/30mm | 1.8*7*2.6MM | 18 |
| 300MM | 25.4/30/32/50mm | 2*7.5*3.2MM | 22 |
| 350MM | 25.4/30/32/50mm | 2.2*7.5*3.4MM | 24 |
| 400MM | 25.4/30/32/50mm | 2.6*7.5*3.8MM | 28 |