Window hardware; support arm,window restrictor

1). S300 Window hardware; support arm is suitable for glass curtain walls,PVC window and large-scale aluminum window of top-suspension windows. 2).The sash automatically locks at a restricted opening angle for child safety,for easy maintenance and to prevent the windows being damaged by strong windows. 3).Tounlock the suport arms from its opening initial position,simply lift the sash smoothly slides up then automatically close. 4).Two types available: a)Single-stop b)Multi-stop 5).Material:Stainless steel S202,S301,S304; 6). We can alsoproduce according to customers' requirements. 7).We are willing to provide pre-sell advice, aft-sell service and technique maintain. Insure you a satisfactory service and a high quality purchase.