The model MSLLA05 is lead free, it is made of nickel alloy, 1000*600cm, 2.8kg/piece, 0.35mmpb, the price of it is 420usd/piece. This model MSLLA01 (395usd/piece)is not lead free, it is made of lead rubber. 1100*600mm, 4.5kg/piece. MSLRS08,970usd/piece,be made of the nickel alloy.the size of it is 1000*600mm, 6.5kg. Yes, but it costs more. The material is totally imported, using tungsten alloy instead of LEAD. It's more environmentally friendly.