RAM-HOL-PD3 Spring loaded cradle expands top to bottom, to hold PDA securely. Four side pins are supplied; these can be positioned to suit the width and shape of the PDA. Width adjustable from 2-1/2" to 3-1/2" and height from 4-5/8" to 5-7/8" The cradle does not ship with a RAM ball. To add a 1" ball to this cradle you need to purchase Part No. T3072.