- For TOP-OPENING FLAP DOOR used with piano, butt or concealed hinges
- Used in pairs
- HDS-20 is designed to hold door in fully opened position
- Torque Calculation: Torque = Door Height × 1/2 × Door Weight K-Type (Light Duty): 140~200 kg·cm (121~173 lbs·inch)/pair, M-Type (Medium Duty): 200~250 kg·cm (173~216 lbs·inch)/pair, H-Type (Heavy Duty): 250~300 kg·cm (216~260 lbs·inch)/pair
WARNING: This product can expose you to acrylonitrile, butadiene, styrene, nickel and chromium, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65WARNINGs.ca.gov.