... plastic like pet bottle, pp/pe pipe etc. 2)lower noise 3)blade is durable 4)safe operateplastic crushing machine1, Good ... to dumpster gate.3, The crushing room use noise arrester, to lower noise.4, Pulley with guards, so it is safe and reliable ... is very suitable for smashing high-densely plastic. CHC-400 Low Noise High Speed Plastic Crusher