Wilwood 200-7528 Stainless Cast Caliper Pistons - USA-WIL-200-7528 - Cast Caliper Pistons Wilwood’s Cast Stainless Caliper Pistons are the standard that all other manufacturers are judged on. Cast construction add extra rigidity to prevent “oil canning” and stainless steel offers low conduction for minimal heat transfer. Engineered from high strength proprietary alloy and with a bright machine finish. Cast Stainless Description Desc Cast Stainless Piston Type Cast Material Stainless Weight (oz) 0.180 Dimensions Dim OD 1.75 Dim Length 0.880