These are Very Heavy strips of sound-proofing material (stuff often used in cars with loud sound-systems etc) I've got lots of them but they are Really Heavy to move (each box full weighs about 40 KG....)
I'm 100 miles away from where this stuff is in storage, so collection has to be arranged well in advance. But I can usually be available at weekends
Sound-proofing/anti-vibration materials (Pensax WR6)
This offer has been gifted to someone and is no longer available.