Sentinel 5036 - Grade 1 Hydraulic Door Closer, Adjustable 3-6 Spring Tension w/ Back Check - Aluminum Non-handed, 9-1/16" x 3/4 Hole Pattern 2-1/8" (54mm) projection Latch, Sweep, & Back Check speed adjustments Tri-Packed for regular, top jamb, and parallel arm applications Cast aluminum body, Painted Aluminum