... any other size 2.compressed spring mattress 3.300g/m2 knitted jacquard fabri bonnell spring mattressHigh grade knitted fabric, 650g ... Inner foam: 1cm thickness, density: 30kg/m37. Pocket spring, 26cm height, wire guage: 2.0mm, 5cm foam ... encase around the spring, density:45kg/m38. Inner foam: 1cm thickness, density ... 0.6cm thickness, 25kg/m3 red surface bonnell spring mattress