Part Number: LT1000P. · 1/2/3/4 x Refrigerator Water Filter(s). Temperature Range: ?. 38-100 Degrees Fahrenheit. GF-D708BSL GF-D708MBSL GF-L570MBL GF-L570PL GF-L677SL GF-L708PL GF-V570MBL. External Testing: NSF.