DC81-1 
Max Door Weight: 15-30kg; Width of door max: 1000mm; Max open angle:180, Closing speed adjustment: Speed1 180°-15°, Speed2 15°-0°; Dimension: L178xW43xH61mm; Applicable temperature: -20℃-45℃; Applicability: left open or right open door; Passed durability test: 300,000 cycles. 

DC81-2 
Max Door Weight: 25-45kg; Width of door max: 1000mm; Max open angle:180, Closing speed adjustment: Speed1 180°-15°, Speed2 15°-0°; Dimension: L178xW43xH61mm; Applicable temperature: -20℃-45℃; Applicability: left open or right open door; Passed durability test: 300,000 cycles. 

DC81-3 
Max Door Weight: 40-65kg; Width of door max: 1000mm; Max open angle:180, Closing speed adjustment: Speed1 180°-15°, Speed2 15°-0°; Dimension: L178xW43xH61mm; Applicable temperature: -20℃-45℃; Applicability: left open or right open door; Passed durability test: 300,000 cycles. 

DC81-4 
Max Door Weight: 60-85kg; Width of door max: 1000mm; Max open angle:180, Closing speed adjustment: Speed1 180°-15°, Speed2 15°-0°; Dimension: L178xW43xH61mm; Applicable temperature: -20℃-45℃; Applicability: left open or right open door; Passed durability test: 300,000 cycles.