FR One-touch Fittings KR-W2
| Series | Applicable tubing O.D. | Connection thread |
| KR-W2 | φ6，φ8，φ10，φ12 | 1/8，1/4，3/8，1/2 |
| Series | Applicable tubing O.D. | Connection thread |
| KR-W2 | φ6，φ8，φ10，φ12 | 1/8，1/4，3/8，1/2 |