Foster 502 Sofa. is made by Brand Walter Knoll. Details and photos of Foster 502 Sofa. are displayed above. You can also check other products in Furnishings category. Brand Walter Knoll / Furnishings Furnishings products by Brand Walter Knoll Foster 503 Armchair. 375 Armchair. 369 Side Table. 375 Chair. Joco Side Table. Foster 501 Sofa.