Set of four M8 Solid Speaker Spikes with Solid Brass Shoes CNC Machined in QUALITY Brass UK made !!! Precision component. M8 thread 30mm long to suit your speakers sub or rack in the best way. Listing is for set of 4 BRASS spikes 4 BRASS pads. For delicate surfaces please use our self adhesive felt pads which can be found in our amazon shop. 15mm felt pads for 20mm speaker spike pads 12mm felt pads for 16mm speaker spike pads Quality product with great service. Check my feedback and buy with confidence !!!!!