20 Pcs whtie plastic screw grommets / insert expanding nuts. The square head hole for a screw diameter of 3mm. Applicable outer hole size is about 7x7mm. Universal for most car, boat, caravan and other vehicles. Please kindly confirm the fitment size before ordering. Square Head Size 9.5x9.5mm/0.37x0.37inch Square Head Hole Diameter 3mm/0.12inch Total Length 9.5mm/0.37inch Square Stem Size 7x7mm/0.28x0.28inch Material Plastic Colour White Quantity 20Pcs Brand Unbranded/Generic MPN TJ4894670597740 Manufacturer Part Number Does not apply EAN 4894670597740 .