RIDGID 38078 Frame, HB-383. RIDGID's HB Series Hydraulic Benders are designed for cold bending of standard gas pipe to the precise degree without compromising pipe durability. These Benders have the capability to bend pipe up to 4 inches in diameter. These Benders are ideal for commercial and residential applications. The RIDGID 38078 Frame, HB-383 is genuine replacement part manufactured by RIDGID and is specifically designed for HB-383 Hydraulic Benders. This RIDGID 38078 Frame, HB-383 is fully covered under RIDGID's 3-year limited performance warranty and lifetime warranty to be free of material defects.