Mobile Radiation Safety Barriers Porta-Shield PortaShield: Positive lock for height adjustmentThe PortaShield is a mobile shield An adjustable 18″ x 24″ lead vinyl curtain $1.00 Request a Quote PortaShield™ Design: Versatile mobile protective shield. Curtain: Adjustable height 18″ x 24″, nylon-covered lead vinyl (0.5 mm Pb equivalent). Uses: Shields patient areas or practitioners during radiographic or fluoroscopic procedures. Features: Heavy-duty five-caster base. Anodized aluminum supports. Positive lock for height adjustment.