Fit male / female reversed to protect and maintain the quality of the insulation thereby preventing moisture problems. Notorious for its excellent thermal and vibration absorption capability, since there is no thermal bridge between elements installed. Manufactured in stainless steel AISI 304 CrNi 18/10, 1st quality, polished with 0.5 mm thick inside and outside, with high-density insulation (coquilha 110 kg/m3 25 mm thick).