... approved . Detailed Product Description brass mini valve code: MKCsize:1/4", 3/8" ,1/2" material: brass body , brass ball , aluminum ... handle .brass mini valve code: MKCsize:1/4", 3/8" ,1/2"material: brass body , brass ball , aluminum ... ) processing the semi-products in workshop .3) assembling the goods .4) testing the sealing in pressure and checking quality of the ...