Non-handed commercial door closer. Adjustable, hydraulic backcheck to provide cushioning and prevents uncontrolled door openings. Size 1 to 4. Fits 1-3/8 In. to 1-3/4 In. thick doors. Tri-pack for regular, top jamb and parallel arm applications. Complies with ANSI A156.4 grade 1(2 million cycles). UL/ULC listed up to 3 hours fire rated. 5 year warranty.