Ko nga Roopu maitai kua pania o mua Ppgi & Ppgl Roopu rino, ka whakamahi i te maitai piauau, galvalume ranei hei taputapu.Whai muri i te maimoatanga o mua o te mata(te whakaheke matū me te maimoatanga huringa matū), ppgi/ppgl te mata porohita maitai kua pania ki te paparanga, ki etahi paparanga ranei o te paninga, ma te tunu me te rongoa, katahi ka riro ko te PPGI / PPGL.I tua atu i te whakamarumaru o te paparanga aluzinc, ko te paninga waro i runga i te paparanga aluzinc e whai waahi ana ki te uhi me te tiaki i te peera rino kua whakakikoruatia te tae, te aukati i te peera rino mai i te waikura, me te roa o te 1.5 wa roa atu i te waa o te piauau / galvalume pōkai maitai.