This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
ASF-Keystone offers gas return cushion units to replace virtually any existing sliding sill applications including the ASF-Keystone DA, SA, SA-MS spring return units. Hydroframe 40 and 60, 20B and others. ASF-Keystone also offers a gas retrofit to replace the Hydracushion. All gas return units feature higher restoring forces to ensure sills properly, the company says.