The body and accessories are surface-painted in silver grey
 
Performance analysis of the all-in-one concealed door closer GMT 1524:
Power: opening force from levels 2 to 4 is steplessly adjustable for maximum flexible use
Opening/closing speed: closing speed and latching speed are adjustable in two stages
Door leaf thickness suitability: minimum door thickness - metal doors 36mm, wooden doors 40mm
140¡ã maximum opening angle: the maximum opening angle is 140¡ã, with door-hold and positioning function from 90¡ã to 140¡ã; the positioning force is adjustable
Ultra-wide ambient temperature range: the thermostatic device ensures the closer performs optimally from +40¡ãC to -35¡ãC, with no need for seasonal adjustment due to temperature changes
 
Dimensions and positioning structure of the GMT 1524 door closer:
Body dimensions: 32mm x 62mm x 230mm
Sliding-channel arm structure provides door-hold and positioning function, with adjustable positioning force
Opening direction - handedness neutral (fits both left- and right-hand doors)
Body material - profile aluminum
Arm material - high-** carbon steel, surface-painted
Spring - high-** carbon spring steel wire
Piston - heat-treated alloy steel
Fasteners - standard wood screws and machine screws provided
Surface treatment: The body and accessories are surface-painted in silver grey

Application
The GMT concealed door closer 1524 is mainly used for wooden and metal doors in finely finished indoor spaces such as hotels, office buildings and shopping malls.