9 number cavity closer to suit 100mm brick and block cavities, each one is 2.40m long. I also have some corner pieces so you can make them up in to window or door formers. the corner pieces state cavalock so I'm pretty sure the cavity closers are the same make. Been in the garage for a while so just having a clear out, there's a few scratches but nothing that affects the performance. would cost around about £80 to buy so grab a bargain. collection only from bd10 or can deliver locally within a few miles if I'm free.