its a schedule 40 pvc pipe (we had real trouble finding it in this country) which is used as water pipes over in the US, its thick walled and quite rigid. I cut the pipe down to 5 foot and marked off a central 6 inch handle section. A heat gun is used to soften the pipe from the edge of the handle to the tip of the limbs then you press the pipe between two beards to create a taper from flat at the tip to round at the handle. the handle is heated and squashed out of round in the other direction to create a more comfortable grip. its strung with 1mm dyneema (from a group buy on here) and the string silencers are just wool strands held by the twist of the string.
I cant measure the poundage but its pretty hefty, initially I put a recurve to the tips but i could barely draw it to my cheek! (the advantage with pvc is that when heated it returns back to its original shape) all the credit should go to the backyardbowyer on youtube as I copied his techniques.