This Connector with floating pin effectively wedges between the battery and in a . adjusting the battery compartment length means you can adjust the screw down depth of the . It able to accept all toppers without having to do any type of manual adjustment on either the or the center post. Features -Color:Assorted Color -Material:Plastic and metal -Size:3.50X2.00X1.50cm/1.38X0.79X0.59in -It adds a Stronger Spring and a hole on the side of the center pin. This makes it easier when soldering your positive wire to the center pin. -The spring made of durable material and carries no current meaning you don't have to worry about the spring clasping when current through it. -This is a spring loaded connector with spring loaded , simple design yet practical for use. -Used connect any and battery, new style with wire connector, easier for DIY . -It able to accept all toppers without having to do any type of manual adjustment on either the or the center post. Package list: 2 x 510 battery connectors