- For TOP-OPENING FLAP DOOR used with piano, butt or concealed hinges
- Opening angle 70° or 105°
- NSDX-20 is designed to hold door in fully opened position
- Speed adjustment screw located on front for easy adjustment
- Torque Calculation : Torque = Door Height — 1/2 — Door Weight Per Piece : 20~70 kg·cm (19~60 lbs·inch), Per Pair : 40~140 kg·cm (38~120 lbs·inch)
WARNING: This product can expose you to cadmium, lead, nickel, 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.