Packed of quality soldering iron sponge, approximately 50x60x10mm, 10pcs in total. The quality is excellent, these wipe my soldering tips every bit as effectively as the one originally supplied by Hakko. No burning, melting or odors. Always... Spare sponge for use with soldering iron stands. 8586D Hot Air Rework Station Soldering Iron Station, 700W Soldering Iron 2 in 1 Solder Station Rework Station Sponge Best 1 Soldering Iron Tips Cleaner Wire Brush With Stand Holder Set Soldering Tip Cleaner Ideal to replace old worn out sponge. Soldering Electronics Sponge at Luke Cornwall blog Can also be used with temperature controlled soldering iron system. Packed of quality soldering iron sponge, approximately 50 x 60 x 10mm, 10pcs in total.