You are buying

A box of 

1 gross = 144 screws

3 1/2" x 18

Nettlefolds

Steel self colour

Countersunk slotted 

Wood screws 

Vintage new / old stock

There may be some tarnishing / rusting due to age

Head diameter - 15mm

Shaft diameter - 7.7mm

Overall length - 87.6mm

A real bargain with free UK postage!