Korea PORON, PSR0.2MM, PSR0.3MM, PSR0.4MM, PSR0.5MM, PSR0.7mm, PSR0.8mm, PSR1.0mm, PSR1.5mm, PSR2.0mm, PSR2.5mm, PSR3.0mm, PSR3.5mm role PSR4.0mm foam: (1) sandwich panel: the role of - pollution, prevent loosening, prevent impact noise, to prevent sticking. (2) LED four weeks: to prevent light leakage, absorb shock, bear high air tightness. (3) PCB lower periphery: absorb impact, absorbing shock, to fill the gap, insulation effect. (4) keyboard gasket: Good rebound, clean, dimensional stability. (5) Battery four weeks: pollution, absorb impact sound, progressive tightness. (6) Feet: Friction is good, clean, good dimensional stability. (7) drives the rear pad: absorb shock and prevent impact noise, improve air tightness. (8) Friction pads: friction is good, clean, good dimensional stability. (9) disc cover cushion: vibration absorption, blocking motor noise, vibration, progressive tightness. (10) Speakers four weeks: to prevent noise, to fill the gap. (11) LCD four weeks: dust, shock absorption, to fill the gap, progress shading (12) surrounding the speaker - to prevent sound distortion, increased air tightness, fill the space. (13) speaker audio peripheral devices - to prevent sound distortion, maintaining spacing, increased air tightness. (14) surrounding the vibration motor - motor and the body absorbs vibration, shock, increased air tightness. (15) surrounding the shell - shock, keep the spacing, increased air tightness. (16) Applicable areas - need to absorb the impact of the good performance of mobile devices, computers, electro-acoustic products, electrical products, electronic medical equipment. Thanks for your interest in our products, if you want to get a better understanding, more information such as PSR02-PSR03-PSR04-PSR05-PSR06 price, PSR02-PSR03-PSR04-PSR05-PSR06 specifications, etc., please feel free to contact us, Cheng invited to provide you with the most satisfactory service!