1) brass quick coupler 2. size is 1/4, 3/8 and 1/2 inch. 3)They include USA type, European type and Japan 4)material brass

1  brass  quick coupler 

2. size is 1/4, 3/8 and 1/2 inch.

3They include USA type, European type and Japanese.

4material brass

brass quick coupler,