The model 4500-B pneumatic bottle crimper is fully equipped with pneumatic controls and regulator. It is supplied with 1 collet of your choice. The collet is adjustable to increase or decrease crimp depth. The stock collets available are 28mm, 20mm, 18mm, 17mm, 15mm, 13mm. Many custom collets are also available for making valve assemblies as well as 1" can valves with an external crimp. The only maintence required is a dab of high pressure grease on the outside of the collet periodically depending on use. It is very operator friendly. It crimps 12 to 15 cans a minute depending on the operator. *Available with foot pedal if requested, at no extra charge. *This product is entirely American made, all replacement parts are in stock if ever needed. Same day shipping ia available. There is no charge for calibration upon purchase.