Product Description200a double pole circuit breaker, requires 4 - 1 inch spaces, breaker or replacement main breaker for Bryant (old style) suffix m, n, or c (not CT) load centers, as branch breaker, with upc bar code, individual pack, bulk.From the ManufacturerFor use in single and 3-phase Type BR loadcenters 150 amps and up. 120/240 Volts ac; 10,000 AIC. Requires two 1" pole spaces on left side and two 1" pole spaces on right side. No.BJHDS hold down kit, necessary for using as a main or back feed device, soldseparately. #2 - 300 kcmil wire range.