TIGER CHAIN BLOCK PROCB, (Twin Head) 20.0t CAPACITY with WLLTIGER CHAIN BLOCK PROCB, (Twin Head) 20. 0t CAPACITY with WLL The PROCB14 is manufactured from the highest quality steel materials, offering a lightweight, compact and rugged construction, producing an exceptionally strong product resistant to impact damage. The exceptional short head room allows for easy installation where every centimetre must be achieved. Using only the highest quality materials precisely machined in our own factory, the TCB is the