CRL380 Series Hydraulic Patch Fittings are medium duty for interior use. There are two adjustment screws to adjust the latching speed and the swing speed. The Hydraulic Patch Fitting is designed for installation without the need for any other floor or overhead closing devices. Maximum door width is 39" (1 m) and maximum weight is 220 lbs (100kg). Fitting can accommodate 5/16" (8 mm), 3/8" (10 mm), and 1/2" (12 mm) tempered glass. Glass fabrication (cut-out) is required.