GIAT USAHA DIENG, PT West Kalimantan Rubber Product, SIR 20, Drs. H. Asril Sultan Amir, Lukito Winarto dieng_pontianak@yahoo.com (62-561) 732318, 730279, 882112, 881577 (62-561) 737959 Jl. Sultan Muhamad No. 19, Sekip Darat