Compatibility: Compatible with most brands of sphygmomanometers. For this reason, we are equipped with 1 models of cuff connectors to facilitate you to connect different models of sphygmomanometers.High-quality material: Made of disposable non-woven fabric, sturdy and durable, the length of the PVC connecting pipe is 30cm. The Velcro has undergone thousands of opening and closing tests to ensure that it is not easy to fall during use.Easy to use:The Cuff can be easily put on the arm of the Neonate, he size can be adjusted by Velcro.Range indicator and number allow you to easily select the correct size for .Size: 1# : applicable range: 3.3-5.6cm, Size 10.3x2.7cm; 2#: applicable range : 4.2-7.1cm, Size 13x3.4cm ; 3#: applicable range: 5-9.5cm, Size 16.5x4.2cm ; 4#: applicable range: 6.9-11.7cm, Size 19.1x5. 2cm ; 5#: applicable range: 8.9-15cm, Size 23.5x6.2cm .Package includes: 1* cuff+ 1*connector