""KCI Jobst System 7500 Sleeves Medium Arm Sleeve Arm length 30 Inch or shorter up to 21.5 Inch circumference 147514 KCI's Extremity Pump System 7500 provides sequential, three-chambered compression to help in the management and reduction of peripheral edema. It's compact, lightweight, portable and designed for home use. The 7500 Sequential Pump System assists people at home to help reduce peripheral edema. This KCI lymphedema pump helps provide lymphedema management via compression therapy and is approved as pneumatic compression devices.This Compression Pump pumps air through tubes into sleeves that apply compression to the limbs and extremities to facilitate veinus and lymph node flow. One of your most important considerations is getting the right size sleeve. Due to the nature of these products we cannot allow returns on opened compression sleeves. Measurement Instructions:When measuring for Arm Garments, you should measure from the arm pit to the wrist. The circumference measurement for an arm garment should be made at the widest part of the arm, either the shoulder or the bicep. All measurements are in inches.When measuring for Leg Garments, you should measure from the gluteal fold, the crease where buttocks meet thighs, to the ankle. The circumference measurement for an arm garment should be made at the widest part of the leg, Typically the thigh. All measurements are in inches.""