PBC Linear VR4 037.000 Undrilled Linear Rail, V Guide, Size 4, 37 in Length, 0.437 in Width, Carbon Steel 429R79 3 4 to 1 in Product 3 4 to 1 in Product Type First Check Valve Repair Kit Compatible with Series 007 Compatible with Mfr It has an on off switch with a built in thermostat that lets you set the temperature at which it operates Range (F) 0 248 Rail Finish Cold Roll For Use With V Guide Wheels and Bushings Raceway Material 52100 Steel Maximum Operating Temperature 248 Degrees F Minimum Operating Temperature 0 Degrees F Rail Type Slide Series V Guide System of Measurement Inch Requires Lubrication Lubricant Not Required Channel Material Steel Load Direction Axial Undrilled Linear Rail