This Uniweld PL15 1,5 in, Posi-Lock Replacement Gauge Lens is a replacement gauge lens for the Uniweld PL15 1,5 in, Posi-Lock Inspection Gauge. This gauge lens is made of durable plastic and has a Posi-Lock connector on one end for easy installation. This Uniweld PL15 1,5 in, Posi-Lock Replacement Gauge Lens is a replacement gauge lens for the Uniweld PL15 1,5 in, Posi-Lock Inspection Gauge. This gauge lens is made of durable plastic and has a Posi-Lock connector on one end for easy installation.