Kitchen Roof Curbs ADAPTER GESR GESS GPE GPEX GPF GPFP GPFR GPFV GPFVP GPFVR GPI GPIP GPIR GPR GPS ISB VCE × ADAPTER Curb adapters adjust the standard fan curb cap dimensions to match a non-standard or existing roof curb size. Up to 20 in. larger Up to 10 in. smaller Purchase Options: REQUEST A QUOTE Configure to Order Need a specific configuration? Submit a request online and get a quote from your local representative within 4 hours. REQUEST QUOTE IN-STOCK PRODUCTS Free Shipping Order now and we’ll ship within one business day. All products include free ground shipping. SHOP ONLINE