This Polished Aluminum Drier & Cap is a super clean addition to any A/C installation project . It does not have a provision for trinary or binary switch installation so we recommend using #34098-VUS A/C Inline Safety Switch Adapter Fitting w/ Schrader Valve along with a female thread binary or trinary safety switch. Comes sealed and pre-charged with nitrogen to prevent contamination and moisture infiltration. Dimensions are 2.5 x 7. Mounting bracket is integral to the cap. It is important that the drier is installed in the correct orientation. On some driers, there is a sticker on the drier to indicate the direction of freon flow. On driers without the sticker, look for "IN" stamped above one of the ports. If your drier is mounted backwards, your A.C system will not work properly. Checking the drier orientation is one of the first things that we do when diagnosing A/C performance problems. Also, the drier works best when it is mounted vertically. Do not tip the drier in any direction more then about 15 degrees. Charge your system with gauges and a scale to measure the correct charge.