Designed for use on heavy duty fire doors in public buildings. Lubricated ball bearing washers provide a lifetime of smooth door operation making them ideal for use with door closers as they reduce closing friction. Fixings included. *Fit with intumescent hinge pads (not included, sold separately product code 487385) when fitting fire doors to adhere to fire regulations. Smooth ball bearing action Suitable for 30 & 60 minute fire doors weighing up to 120kg For doors with heavy traffic: tested to 200,000 cycles CE Approved: BS EN 1935" Size L x W mm: 101 x 76 Knuckle Dia. mm: N/A Hole Dia. mm: N/A Thickness mm: 3.0 Knuckle Type: Ball Bearing Corner Type : N/A Material: Stainless Steel Finish: Matt BlackSize 101 x 76 x 3 - 3 Pieces