RIDGID 38193 HB-382 Ram. 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 38193 HB-382 Ram is genuine replacement part manufactured by RIDGID and is specifically designed for HB-382 Hydraulic Benders. This RIDGID 38193 HB-382 Ram .