Product Description： 

A、Material：plastic POM、Zinc alloy、 cold-rolled steel Q235、 PA66、spring 65Mn

B、Finish：plated（brass + nickel + sealing） , polish, heat treatment

C、Different colors meet your requirements

Features：

A、Upward opening to 35°, free stop at any position you want.

B、Adjustment according to the door weight is achieved to get a better function.

Product Advantages：

A、Appearance Patent No.: (ZL 2003 3010 1764.2)

B、Using wheel gear inside to avoid skiding , free stop at any position you want.

C、Having a good stability, opening for a labor-saving, closing without noise.

D、YS311 passed 50,000 cycles durability test which is far beyond the CNS requirements of hinge- 40,000 times.

Ps: 

Difference between YS309, YS310, YS311 and YS312 flay stay:

(1) different design

(2) Internal structure:

YS309 flap stay---friction clutch inside

YS310 flap stay---steel ball and cam construction inside

YS311 flap stay---wheel gear inside 

YS312 flap stay---wheel gear inside

YS311 Flap stay Picture 

Features：

A、Upward opening to 35°, free stop at any position you want.

B、Adjustment according to the door weight is achieved to get a better function.

Product Parameter：

Pls refer to the illustration below

Product Advantages：

A、Appearance Patent No.: (ZL 2003 3010 1764.2)

B、Using wheel gear inside to avoid skiding , free stop at any position you want.

C、Having a good stability, opening for a labor-saving, closing without noise.

D、YS311 passed 50,000 cycles durability test which is far beyond the CNS requirements of hinge- 40,000 times.

Others（Packing and Services）：

Package: 25pcs/inner box，100pcs/box,  

N.W/G.W: 22kgs/25.65kgs

MEAS: 32cm * 27.5cm * 23cm,                             

Delivery Date: Normally in one month        

MOQ:  3000pcs

Samples Preparation: samples can be sent in 3 working days (DHL 3-5days，UPS3-5days，Fedex/TNT 3-5days，EMS 7days reach destination )