Spec:HS- | For crimping F connector | Compressed distance | 508 | RG-59(4C)&R G-6( 5C) | 20.30±0.15mm | 508 A | 19.30±0.15mm | 508 B | 19.7 0±0.15mm | 508 C | 20.7 0±0.15mm | 508 D | 20.3 0±0.15mm | 508 N | RG-59(4C)&R G-6( 5