VIANS VI-S505 100KG Concealed Door Closer – Hydraulic Fire Door Closer with Hold-Open, Adjustable Speed, EN3-4 ASUS Optional: Stainless steel arms for

Optional: Stainless steel arms for increased strength and aesthetic appeal

Microphones powered by 2 x AA batteries

3 cardioid microphones

Memory: 8 GB GDDR6

VIANS VI-S505 100KG Concealed Door Closer – Hydraulic Fire Door Closer with Hold-Open, Adjustable Speed, EN3-4 ASUS Optional: Stainless steel arms forThe VIANS VI S505 is a concealed hydraulic door closer designed for heavy doors in commercial and public buildings. Installed inside the door leaf and frame, it offers controlled door closing, improved aesthetics, and reduced risk of vandalism. Product Parameters Model VI S505 Product Name Big Door Closer Lock Size 238 60 40 mm Fix Size 188 19 mm Max Door Weight 40 100 kg Max Door Width 850 1250 mm Max Opening Angle 180 Spring Power EN34 Closing Speed