a) Made of transparent PC.
b) Prevent the valve handles from being turned when locked out.
c) Buckle directly to lock.
d) SBL11 can accommodate inner valve up to 65mm diameter and 29mm tall. SBL12 can accommodate inner valve up to 89mm diameter and 49mm tall.
e) SBL11 can accommodate outer valve up to 70mm diameter and33.6mm tall. SBL12 can accommodate outer valve up to 91mm diameter and 53mm tall.
| Part No. | Description |
| SBL11 | Hole diameter: 31.9mm×31.9mm |
| SBL12 | Hole diameter: 40mm×40mm |