Wika 2.5″ type 212.53 3,000 psi/kg/cm2 gauge – 1/4″ npt lm stainless steel wika type 21x.53 gauges feature a stainless steel case for protection in harsh environments. The o-ring seal around the connection makes this gauge field liquid fillable. When filled, the 213.53 is excellent for high vibration and pulsation applications. specifications: connection location: lower mount wetted parts: brass copper alloy case material: stainless steel case filling: splash resistant window type: standard window construction: polycarbonate