It is recommended that you use 13 of these fixings per 5000mmm plank. This clip has the following dimensions: 36mm (L) x 40mm (W) x 11mm (T).This pack contains 100 x stainless steel intermediate clips.KEY BENEFITS OF THIS PRODUCT10 year guarantee.Anti-slip finish.No rotting, splintering, warping or algae growth.Easy installation.Environmentally friendly.Maintenance free.To view a downloadable installation sheet for WPC decking, click here.Delivery lead time for this product will vary depending on your location. For more details, please see the Storm Building Products delivery map in the deliveries and returns tab.