It consists of a box of all the standard 1/4" (6.35mm) Q.C. tabs and recepticles, but also the odd Q.C. sizes ie: 3.3mm and 4.8mm sizes. To finish off the box we've thrown in a heap of other handy connectors as well. It is a great kit of wire connectors / terminator hardware.Total 160 pieces.Includes:- 10 x 6.4mm female crimp spade lugs wire dia 1.8mm- 10 x 6.4mm female crimp spade lugs wire dia 3.5mm- 10 x Close end wire crimpers - dia 2.6mm- 10 x Close end wire crimpers - dia 3.8mm- 5 x Contact wire connectors- 10 x Female bullet connectors - insulated- 10 x Male bullet connectors - insulated- 5 x 3 way spade lug connectors 6.8mm- 5 x spade piggyback connectors 6.8mm- 10 x4.9mm female spade lugs- 10 x 8.4mm hole dia ring terminals- 10 x 5.7mm hole dia ring terminals- 10 x 5.3mm hole dia spade terminals- 10 x 4.3mm hole dia spade terminals- 5 x 3.5mm dia butt connectors- 5 x 2.3mm dia butt connectors- 5 x 1.8mm dia butt connectors- 10 x 3.3mm spade connectors (tweeter connectors)- Beware of others with less than 160 pieces.