ps pro-set ‘vortech’ 2 valve manifold for (r22/134/404) with sightglass, 80mm gauges & protective, rubber gauge boots, complete with 150cm hoses and carry case; features: advanced vvs diaphragm valve system. 45deg fittings. anodised aircraft-aluminium block body. precision, flutter-free metal cased gauges. heavy duty handles. oversized refrigerant sightglass. advanced 1-piece valve design. superior refrigerant metering capabilities. vacuum rated to 15 micron or better. certified 5-year trouble-free valve life. maximum un-restricted refrigerant flow. light touch valve operation.