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Arrived quickly. Easy to identify the N/C (normally contact) terminals as they are the 2 chrome ones in the centre - and have the reed relay connected to them. Also confirmed this 'and working' using a muti meter before fitting. No problems fitting - taking out the block terminal from the casing makes it easy to connect wires. As usual the push out for the cables is to small - so make larger as appropriate. Easy. Quality looks ok and probably as reliable as any other. Time will tell.

Fitted one of these contacts to the door nov 217. It is now sep 218 the contact gave a false alarm in the middle of the night. Then the contact stayed in the normally closed position when i was doing a walk test on all the windows and doors. This is a poor quality product.

Brilliant and do what there supposed to for a cheap price. The only problem is that there is no cable entry hole on the connector itself so you will need to carve one out.

A nice surface contact... little bit slimmer than the newer grade 2/3 contacts on the market as no tamper switch, which was ideal for the lack of space I had to install it.

Does the job. Had to replace door sensor after a new door was fitted.

good quality good delivery time.

good quality work well

Ideal