| Item No. | Concrete Cover | For Bar Diameter（mm） | |
| mm | inch | ||
| CWRRC4-01 | 25/30mm | 1"-1 1/4" |
6-20mm |
| CWRRC4-02 | 25/40mm | 1"-1 1/2" | |
| CWRRC4-03 | 40/50mm | 1 1/2"-2" | |
| CWRRC4-04 | 50/65mm | 2"-2 1/2" | |
| CWRRC4-05 | 65/75mm | 2 1/2"-3" | |
| CWRRC4-06 | 70/80mm | 2 1/2"-3 1/4" | |
| CWRRC4-07 | 75/90mm | 3"-3 1/2" | |
| CWRRC4-08 | 85/100mm | 3 2/5"-4" | |
| CWRRC4-09 | 90/100mm | 3 1/2"-4" | |