The Trerice 450LFB4502LA110 is a 450 series process gauge with a 100 psi pressure max, 4.5" dial size, 1/4" NPT lower mount connection, brass wetted material, and plastic case material. The Trerice 450 Series Process Gauge is designed for the petrochemical and industrial process industries. This solid front, blow-out back gauge is noted for its fiberglass reinforced polypropylene turret case and screwed ring; its sturdy interior design; and its field liquid-fill capability (no kit required). The 450 Series can withstand the most rugged industrial applications, while maintaining precise accuracy. Wetted parts are bronze tube/brass socket or stainless steel.