Habachain, 821, low-back-pressure chain, straight, heavy duty, low friction acetal, 5’l, 7.5″w habachain lbp 821 (straight) description: lbp 821 is a heavy duty straight running only low-back-pressure plastic chain. Applications include packaging lines in the accumulation areas especially around the palletizers. pin material: stainless steel standard packaging: 1.524 m = 5ft the weight specification is indicative roller materials: lf (dark gray) for chains with body material lf, h (blue) for chains with body material pt (h material for lower noise and higher wear resistance) other materials on request