C.R. LAURENCE FH1520 CRL 15" Tubular Spiral Tilt Window Balance Red Bushing C.R. Laurence Red Bushing Indicates Sash Load Weights of Up to 25 Pounds (11.3 kg) Tilt Window Type with Industry Standard 9/16&quot; (14 mm) Tube Diameter Will Replace Either Metal or Plastic Tube Balances