17 Architectural acoustic products, namely, polyurethane sound absorbers in the form of boards or strips; architectural acoustic products, namely, polyurethane sound absorbers in the form of boards or strips; architectural acoustic products, namely, sound absorbers, made of or containing polyurethane rigid foam, in the form of boards or strips; polyurethane insulating materials in the form of boards or strips; insulating materials made of polyurethane in the form of boards or strips; insulating materials made of or containing polyurethane rigid foam in the form of boards or strips; plastic composite material made of polyurethane in the form of profiles, boards, sheets, blocks, rods, strips, powder, and pellets for use in manufacturing; polyurethane material in the form of profiles, boards, sheets, blocks, rods, strips, powder, and pellets for use in manufacturing; polyurethane composite material in the form of profiles, boards, sheets, blocks, rods, strips, powder, and pellets for use in manufacturing